Voltage input: DC5V=0.5-1.0A Power: 1W Battery: Polymer battery 800mAh Battery cycle life: 500 cycles Use time: 50 hours Charging time: 1-1.5 hours Product weight: 150g Product color: white Product size: 80*80*33mm Instructions for use: The product has a total of 5 buttons: a switch button (includes play/pause function), a timer button, a light button, a previous song button (includes volume down function), and a next song button (includes volume up function). Sleeping music: 9 songs (white noise, waves, crickets, rain, birds, water, lullaby 1, lullaby 2, lullaby 3) The light button can operate independently, even when the device is not powered on. Long press for 0.5 seconds to turn on; short press to play/pause. After powering on, the device plays one piece of music and loops continuously. Press the previous/next song buttons to switch tracks; long press to adjust volume. The device remembers the last played music and automatically resumes from the same track upon next power-on. Press the light button to activate breathing light mode with 6 cycles, each starting with a 10-minute countdown. During this period, the light rhythm gradually slows down. The light brightens to simulate inhalation and dims to simulate exhalation, guiding breathing. This function automatically turns off after 1 hour. If the timer is not active, pressing the light button activates the default breathing light cycle. Timer options: 15 minutes (red LED), 30 minutes (green LED), 60 minutes (blue LED). Short press to cycle through settings; the fourth press disables the timer. Each setting is indicated by its respective LED.