Battery capacity [mAh]: 1200 Number of devices that can be connected simultaneously: 1 Maximum wireless range [m]: Less than 10m Sound mode: High-resolution sound mode Category: Speaker Usage: home Bluetooth version: 5.0 Impedance: other Voice control: None Frequency range: other Display: Yes Waterproof: none Support APP: No Support memory card: yes Play function: MP3 Built-in microphone: None Audio frequency division: full frequency Number of speaker boxes: 1 Power supply: USB Channel: 1.1 Battery: Yes Communication : Bluetooth Speaker type: portable Function: clock, dual alarm clock, tf card playback Model: Bluetooth Speaker Portable Dual Alarm Clock Colour:Black Material:plastic Package Contents: 1 x clock 1 x data 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.