[ Broadcom BT 5.1 Chip Compatible with Most Devices ] - The high level of compatible devices suggests that you'll use this keyboard for many Bluetooth-enabled devices. Windows, Android and iOS are compatible with keyboard. If you your phone or if you change your laptop/tablet, you'll simply keep using the same keyboard. [ Great for Trip and Normal use ] - Foldable, when folded, it will become small and portable, you will put it in easy. take it everywhere in your trips. convenient. and you can also use it as normal keyboard, good type . [ Rechargeable Battery ] - Users pleasure from up to 40 hours of writing time with only one charge. The Wireless Folding has a rechargeable lithium- battery. Standby time is up to 90 . High Grade Mini Portable Foldable Folding Wireless Bluetooth 5.1 Keyboard Type-C charge port for Windows / android / for ios / os smart devices like computer laptop tablet pc phone etc. with BT function. High grade design, materials and workmanship Whole flat, type smoothly, good hand Broadcom BT5.1 Chip , fast , stable, strong compatibility,widely use Built-in Rechargable -battery, one time full charge can use for long time(about 2-3 month). It can connect and work for 3 devices at same time, just click fn + BT1 (key A) , BT2 (key S), or BT3 (key D) to fast change , convenient. fn+ C (pairing) to do pair and connect. Wireless Bluetooth 5.1 connection Number of keys: 65 Chip: Broadcom BT5.1 ( fast, stable, low power-consumption ) Type-c charging port Bluetooth transmission distance upto 10 Working voltage: 3.3~4.2V Battery: rechargable 90mAh lithium battery Working current: Less than 3MA Standby current: Less than 1MA Compatible system: Windows/Android/for IOS Type:Bluetooth Wireless keyboard Application:Desktop,Laptop,Number,Tablet Keyboard Standard:Mini Keyboard Style:Standard Interface Type:USB color:Black grey Material:ABS size:Folded 142mm x 101mm 2x 3.8mm, unfolded 270mm x 101mm x 11.9mm Package Contents: 1 x folding Wireless 1 x Charging Cable 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.