Voltage input: DC5V = 0.5-1.0A Power: 1W Battery: Polymer battery 800mAh Battery cycle times: 500 times Use time: 50 hours Charging time: 1-1.5 hours Product weight: 150g Product colour: white Product size: 80*80*33mm Instructions for use. The product has a total of 5 buttons, a switch button (including play/pause function), a timing button, a light button, a previous song (including sound minus function), a next song (including sound plus function) Sleeping music: 9 songs (white noise, waves, crickets, rain, birds, water, lullaby 1, lullaby 2, lullaby 3) The light button can work independently, even without being switched on Long press 0.5 seconds to turn on the button, short press for play pause, after turning on the machine, play a piece of music, the music is made to loop all the time Press up and down the first can be switched, long press for volume up or down, after the boot with memory play, which one music also with memory, the next boot automatically play the last shutdown music Press the light button, divided into 6 cycles, from 10 minutes to 0 for a cycle, 10 minutes to start the countdown, 10 minutes to start the breathing rhythm gradually slow down. The light is bright for breathing in, the light is weak to exhale and guide the breathing, this function is automatically timed off for 1 hour, in the absence of the timer function, if the timer function is on, press the timed time The timer is divided into 15 minutes (bright red LED) 30 minutes (bright green LED) 60 minutes (bright blue LED) short press to switch, the 4th press to close the timer. Indicated by LEDs respectively