Extonic ET-C702 USB Air Cooler Fan

A desk fan moves air; the Extonic ET-C702 moves cooled air. This compact USB-powered air cooler pairs a fan with fine water mist — five nozzles release up to 225 ml of mist per hour while the fan pushes the cooled breeze up to 2.5 metres across your desk, nightstand, or work table. The extonic et-c702 is made for Bangladesh’s dry heat: fill the 600 ml top tank, pick a mist timer, and feel the temperature drop without an air conditioner. One honest note up front — this is a USB-powered unit, not a rechargeable one, so it needs a constant 5V/2A source (charger, laptop, or power bank) to run.

Design and Build

The extonic et-c702 is a square-bodied cooler that sits neatly on a desk: a transparent 600 ml water tank spans the top (so you always see the water level), five mist nozzles and four touch buttons run across the front panel, and a square fan grille sits below them. A tan leather carry handle arches over the top for easy moving. At 21 × 9 × 26 cm it is compact enough for a nightstand yet substantial enough to cool a whole desk corner.

It comes in Blue and Green variants — the store’s listings show both, and the cards in this listing render the blue unit. Whichever variant you receive, the design is the same: transparent tank, five nozzles, touch panel, and the carry handle.

Mist Cooling: How It Works

Evaporative cooling is the whole trick. The extonic et-c702 atomizes water into a fine mist through its five nozzles — up to 225 ml per hour — and the fan blows that mist into the room, where evaporation pulls heat from the air. The result is a noticeably cooler breeze than a fan alone can produce, especially in dry conditions. The diagram below shows the path: tank → nozzles → fan → room.

The mist is fine, not wet: at this droplet size it evaporates into the air rather than soaking your desk. For a stronger chill, the tank accepts ice or cold water — the classic air-cooler move — and the cooled airflow carries it straight to you.

600 ml Tank, 2.5 m Reach

The 600 ml top tank is the extonic et-c702’s stamina figure: at maximum mist output it stretches across hours of cooling between refills, and the transparent wall means you refill before it runs dry. Fewer refills, longer cooling — that is the promise of the big tank in a desk-scale unit.

Reach matters on a desk cooler, and the extonic et-c702 delivers: the fan pushes the misted airflow up to 2.5 metres, so it cools across the desk and into the room — not just the square metre in front of it. Place it at one end of the desk and feel it at the other.

600 ml is generous for this size class: it is what lets the extonic et-c702 run a full work session or a full night of sleep support without a mid-session refill.

Timer, LED and Touch Controls

The mist timer runs from 2.5 to 12 hours — set it before sleep and the extonic et-c702 mists through the night, then stops on its own. The four touch buttons on the front panel control mist, fan, timer, and the multi-colour LED, which adds a soft night-time glow to the unit. Light the timer, keep the mood: the LED turns a desk cooler into a nightstand companion.

Power: USB 5V — Not Rechargeable

This is the honest-spec section, and it matters: the extonic et-c702 has no battery. It runs on USB DC 5V at up to 10W (2A max) through a Type-C port, and it needs that source connected the whole time it runs. Plug it into a wall charger, a laptop, or a power bank — during load-shedding, a power bank keeps it cooling. What it will not do is run cordless: there is nothing to charge and no runtime-per-charge to quote. If you need a cooler that works unplugged, this is not that product — but if you have USB power nearby, the extonic et-c702 cools as long as the water lasts.

Specifications

Every figure above is taken from the product page and the verified research notes for the extonic et-c702. The page does not list box contents, noise level, or a battery runtime (it has no battery), so none is listed here.

What’s in the Box

The product page confirms the Extonic ET-C702 unit itself but does not enumerate the full box contents in detail — a USB cable is not specified on the page, so it is not promised here. Expect the extonic et-c702; if your parcel differs from what you expected, contact Gadget Superb with your order number and the team will sort it out.

Why Buy From Gadget Superb

Buy from Gadget Superb and you pay cash on delivery — in cash, when the parcel reaches you, with no advance payment, card details, or OTPs ever requested. Delivery takes 1–3 working days inside Dhaka (৳70) and 2–5 working days outside Dhaka (৳120), and a 7-day easy-return promise covers every order: keep the extonic et-c702 in its original condition with box and accessories, and start a return with your order number via hotline 09638054751, care@gadgetsuperb.com, or Messenger.

Compare it with the rest of the Fans & Cooling collection, or browse all air coolers to find the right match for your room.

Frequently Asked Questions

Is the Extonic ET-C702 a rechargeable fan?

No. The extonic et-c702 is USB-powered with no battery — it must stay plugged into a 5V/2A USB source (charger, laptop, or power bank) the whole time it runs. It cannot run cordless. If you need a cooler that works unplugged, this is not that product.

Does the Extonic ET-C702 come with a warranty?

This product carries a 7-day store warranty as listed in its specifications above. If warranty terms matter to your purchase, please confirm the details with the store — via hotline 09638054751, care@gadgetsuperb.com, or Messenger — before you place your order.

How long does delivery take, and what are the charges?

Inside Dhaka, delivery costs ৳70 and takes 1–3 working days; outside Dhaka, it costs ৳120 and takes 2–5 working days. These are estimates, not guarantees, since courier conditions vary. Your cooler ships once you place a cash-on-delivery order.

How does cash on delivery work? Can I check the cooler before paying?

Cash on delivery means you pay the courier in cash when the parcel arrives. Gadget Superb never asks for advance payment, card details, OTPs, or mobile-banking PINs. Couriers generally do not allow opening a parcel before payment, so check your extonic et-c702 right after the courier leaves and contact the store within the 7-day return window if anything is wrong.

What is the return policy if my cooler arrives faulty?

Every Gadget Superb product carries 7-day easy returns. If your extonic et-c702 arrives damaged or faulty, keep it in its original condition with the box and accessories, then start a return with your order number via hotline 09638054751, email care@gadgetsuperb.com, or Messenger.

How does the mist cooling actually work?

The extonic et-c702 atomizes water through five nozzles into a fine mist (up to 225 ml/h) while the fan blows it into the room. The mist evaporates and pulls heat from the air — evaporative cooling — so the breeze feels noticeably cooler than a fan alone, especially in dry heat. Adding ice or cold water to the tank boosts the effect.

How long does the 600 ml tank last?

At maximum mist output (225 ml/h), a full 600 ml tank runs for several hours; at lower mist settings it stretches longer. The transparent tank shows the water level so you can refill before it runs dry. The mist timer (2.5–12 h) can also stop it automatically.

Can I use it during load-shedding?

Yes — the extonic et-c702 runs on USB 5V, so a power bank (5V/2A) keeps it cooling through an outage. It draws up to 10W, well within what a standard power bank delivers.

How far does the airflow reach?

Up to 2.5 metres. The extonic et-c702 is a desk cooler, but its airflow crosses a desk and reaches into the room — place it at one end of your workspace and feel the cooled breeze at the other.

What is the mist timer for?

The timer runs the mist from 2.5 to 12 hours, then stops it automatically. Set it before sleep and the extonic et-c702 mists through the night without running dry the whole time — pair it with the multi-colour LED for a nightstand-friendly glow.

Does it come in different colours?

The page lists Blue and Green variants of the extonic et-c702. The cards in this listing render the blue unit; both variants share the same design, tank, nozzles, and controls.

What is the price of the Extonic ET-C702 in Bangladesh?

The current price appears on the product page and can change during sales, so no figure is quoted here. Check the live extonic et-c702 page on Gadget Superb for today’s price — that is the amount you pay in cash on delivery, plus the standard delivery fee.