Turn on:turn the lever clockwise. Shut down:turn the lever counterclockwise to return. Audio source:Bluetooth/TF card/FM/AUX; Audio source switching:Click the M key to cycle through Previous song:Double click the knob; Next song:Click the knob Increase or decrease volume:Turn the knob Switch the ambient light:click the light button and use the essence to drip on the plastic tray (pick up the plastic tray and drip the essential oil to prevent the essential oil from contaminating other parts of the product) Product model:Round-X19 Chip model:Jerry AC6965A Bluetooth version:V5.3 Support protocol:BR+EDR+BLE Audio decoding:MP3, WMA, WAV Transmit power:+6dBm Communication distance:10M Working frequency band:2.4GHz Master-slave switching:supported Charging voltage:5V Charging time:about 2.0 hours Battery model specifications:18650, 3.7V, 1500mAh Music play time:7-8 hours Charging interface:TYPE-C 2 Speaker parameters: Speaker impedance:4ohm Sensitivity:87dB/W/M Rated output power:5W Rated input power:5W Speaker size￠40mm Product net weight:485g Colour:A:Black/B:Pink/C:Green Material:ABS Size:180x130x71mm Package Contents: 1 * aromatherapy Bluetooth speaker 1 * 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.