Specifications: 1. Shl material: plastic 2. Bluetooth protocol: 5. 03. Interface type: USB 4. Effective transmission distance: 10 meters 5. Play time: 8 hours 6. Power supply mode: external power supply 7. Support format: TF, U disk, Bluetooth, audio cable 8. Frequency response range: 50-60Hz 9. Output power: 50-60Hz 10. Signal to noise ratio: greater than or equal to 75dB 11. Expansion storage: 16GB (not included) 12. Chann: 213. Number of speakers: 214. Standard power input: AC 100-240V /50-60Hz 15. Output: DC 9V/2A switching power supply 16. Product weight: 0.275kg 17. Appearance size: 91x101x160mmFeatures: 1. With remote control function 2. Clock backup power supply, equipped with CR2032 button battery power-off time memory function 3. Double alarm clock function, daily alarm and daily alarm, 5 music can be sected for alarm ringtone, with snooze function 4. LED display, week display, adjustable LCD lamp beads display screen backlight brightness, you can also turn off the display 5. Automatic shutdown function, once every 15 minutes (15/30/45/60/75/90 minutes automatic shutdown function can be set) up to 90 minutes 6. Full state 3.2 inch LED lamp bead digital display, with time (12/24 hours switchable), temperature, function mode display 7. With dual coils, the wiress charging mobile phone can be charged horizontally and vertically, and the USB on the back can also be used for charging the device (output 5V 2A) 8. Music playback function; Bluetooth 5.0 transmission stereo, Bluetooth device play, up and down, play/pause control, Bluetooth hands- call function 9. FM digital stereo radio (insert audio cable as radio antenna), radio memory playback, TF card playback control function, AUX audio cable connection to play music