1.compatible 5.1 master control: low delay, stable performance, of high-quality keyboard 2. size touchpad with left and right buttons: the use experience of notebook touchpad is as as possible 3.3 Channel Bluetooth-compatible connection: It supports simultaneous connection of up to 3 Bluetooth-compatible devices, and arbitrary switching 3 devices 4.Rechargeable lithium battery: built-in 140mAh capacity rechargeable lithium battery, extra long standby, environmental protection; Multi device and multi system compatibility, does not support TV stick 5.3 Folding keyboard: combine the perfect typing experience of standard size keyboard with the portable small size advantage brought by folding. Application:Laptop,Tablet Language:English Operation Style:Capacitive Style:Folding Package:Yes Model: B066T Connection mode:Bluetooth-compatible Battery specification: 140mAh lithium battery Charging interface:Type-C Number of key caps:78 keys Key structure:scissors feet Key layout:English System support:Win/Android/IOS/OS/ Working voltage and current: 3.2-4.2V Less than 2.2mA Operating current of :Less than 9.6mA Standby/sleep current:0.8mA/0.017 A Service life:40h Standby time:150 Key operation life:3 cycles Keyboard weight:233g Instructions: Anti rubber pad:12 pieces of anti rubber pad, reducing wrong input and providing stable input experience Seamless splicing, standard single zone, and 1:1 blind typing experience compared with desktop key. Colour:Black Material:ABS Size: unfold:342.35x114.7x12.2mm/13..5x0.47in fold:182.25x114.7x21.3mm/7x4.5x0.83in Package Contents: 1 x Foldable Bluetooth Keyboard Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.