Product specification: 1. Charging Time: 2-2. 5 hours> 2. Bluetooth continuous working time: 9-10 hours> 3. Power/Hand free/stop/players> 4. Vol up/next 5. Vol down/previous product characteristic: 1. Support Bluetooth communication and Bluetooth musical> 2. Low loss high quality stereo sound> 3. In build Lithium ion battery with Micro USB charging function> 4. Led display for working status> 5. User friendly function design - just three buttons, Easy to operate> 6. Washable: easy to take the speaker down and install so that you could always clean it up Bluetooth music play Instruction: 1. Press once play/stop button 2. Start playing, press once again> 3. Long press VOL- will constant reduce volume to minimum, A 'di di 'sound will be heard when reaches minimum level> 4. Long press VOL+ will constant increase volume to max, a ' di di' Sound will be heard when reaches max level note: 1. Open the Bluetooth in your phone and match with Bluetooth name "" 2. Can be washable When take out the Bluetooth module. 3. Both speakers are not fixed, can adjust placement accordingly based on your size> 4. Please adjust the volume from your mobile or long press VOL+ from Bluetooth if you can't hear any music. 5. The sound may have a bit noise if there's environmental interference> 6. . It can't be connect to 2 Bluetooth at the same time, If you want to connect next device, please cancel the match in the Bluetooth of the previous one device. package includes: 1x Bluetooth sleeping eye mask 1x USB charging Cable 1x manual【】: if you have any problems of the sleep eye mask, please feel free to contact us. We support refund within 30days and replacement within 90days.