White Noise Machine Portable Sleep Therapy Device with 34 Natural Sounds 30/60/90 Minutes Timer 9 Light Effects Built-in 1800MAH Battery for Children and Adults Color: White Built-in 34 sounds: white noise, pink noise, brown noise, wall fan, fan, floor fan, wind, awning, drizzle, thunderstorm, moderate rain, ocean waves, stream, birdsong, crickets, frogs, fire, bonfire, womb, hush hush, cafe, hand chimes, clock, zen sound, wind chime, ship, airplane cabin, train compartment, serenade, music box, star song, early morning song, dream song, cheerful song Timer off: 30/60/90 minutes Volume adjustment: 30 levels Long press stepless tuning: support Lighting effects: 9 kinds (3000K warm light, red, green, blue, orange, purple, green, colorful light breathing, colorful light flashing) Battery: 1800MAH battery Working time: more than 8 hours of continuous playback use Product size and weight: 84mm×84 mm*81mm Material: abs+fluorescent powder+pp Working voltage: 3.7V    Dynamic current: unlit <200mA, lit <400mA     Static current: 20uA Speaker: 4Ω3W Charger support: input AC 100 ~ 240V <50 / 60Hz output DC 5V, 1A Product size: Ф84×84mm Package size: 10.2*8.7*8.7cm Package weight: 261g