Description:Say goodbye to the wired keyboard with a click sound, the F21 Wireless Keyboard gives you a quiet and smooth working enjoyment.BT3.0 connection protects your eyes and you will have a more comfortable posture when you're typing. With an ultra-slim design, puts it into your bag, easier for you to use anytime and anywhere, controls your device with it effortlessly.Light but powerful keyboard, takes it with you, lets you enjoy more interest.Features at a glance:- 9.7 inch portable size, only 5mm thickness and lightweight- Adopts BT3.0 technology, the wireless distance is up to 10m- 7-color backlight with 3-level brightness- Compatible with Windows, iOS and Android- No needed drives, plug and playPortable working partnerUsing BT3.0 technology, makes connection effortless. And it supports to connect Bluetooth-enabled devices such as PC, tablet, smart TV, smartphone, etc. Ultra-slim design, easily fits in your hand or bag, types in comfort with the familiar keyboard layout you're used to, free up workspace on your desk, coffee table or wherever you use your laptop / tabletWonderful backlight7-color backlight with 3-level brightness, switches the color you like. Shows your style and makes your unique keyboard. Also, it will protect your eyes in the dark Durable to useEnsures even stricter requirements are met for each switch produced, this keyboard provides more than 5 million click times. Carefully-crafted textured panel makes it more durable and fashionable Model: F21 Type: Keyboard Material: ABS Keyboard Type: Membrane Keyboards Backlight Type: Colorful light System support: Android,IOS,Windows Key Number: 66 Connection: Bluetooth Interface: Micro USB Keyboard Lifespan ( times): more than 5 million times Response Speed: 0.5ms Bluetooth Version: V3.0 Battery Type: lithium-ion battery (included) Battery Capacity (mAh): 270 Working Time: 80 hours Charging Time: 4 hours 0.3590 Package weight: 0.403 kg Product size (L x W x H): 23.70 x 13.20 x 0.50 cm / 9.33 x 5.2 x 0.2 inches Package size (L x W x H): 28.00 x 14.00 x 18.00 cm / 11.02 x 5.51 x 7.09 inches Package Contents: 1 x Keyboard, 1 x USB Cable, 1 x Bilingual User Manual in English and Chinese