Description: Color: black Material: ABS Function: Bluetooth audio / clock / alarm clock / radio / temperature display / TF card reading Display: LCD digital display Bluetooth version: Bluetooth 5.0 Temperature: real-time ambient temperature Brightness: 3 levels adjustable Alarm clock: 2 alarm clocks can be set Power supply: One rechargeable 18650 battery (built-in) Battery capacity: 1400mah Charging interface: MICRO USB Product size: 14.3 * 4.7 * 3.2cm It supports both Bluetooth 5.0, greatly satisfy your connection demands. You can put anyway on bedroom, desk, kitchen, office or carry for travelling. It can also work as an alarm clock to wake you up naturally every morning. TF card port is specially designed for you to listen to the music without any other devices. The beeping speeds up every few seconds if you don't wake-up or shut the alarm off right away, which is nice for people who can sleep through alarms. Packing list: 1X audio, 1X USB cable, 1X manual