BT5.1 keyboard,compatible with BT3.0 and BT4.0 for fast transmission speed.10M long distance transmission for stable BT connection. 100 circular keycaps and compact design,compared with common keyboards,saving about 55mm desk space. Mini and super cute design,2 kinds of mixed colors for option,your best choice whether working or playing games.(We will present a sticker at random) Wide compatibility,compatible with Mac,Android,IOS,Windows BT devices,such as phone,tablet,laptop. Cross-device connection is supported,connect with 3 devices simutaneously at most. Mini and portable,ultra-long standby time fulfill your daily working needs.