White Noise Machine Sleep Sound Machine For Sleeping & Relaxation for Baby ，Adult，Office，Travel. Built in USB Timer.. A-style Product parameters: Material: ABS + PC + silicone + electronic components Size: 80 * 80 * 33mm Input voltage: DC5V Working voltage: 4.2V Charging current: 1A Power: 1W Battery capacity: 1200Ma Charging mode: USB Charging time: 1.5h Use time: 36h Certification: FCC / CE Product list: 1 * host 1*usb 1 * instruction manual Product selling point: 9 kinds of smooth and natural sound: white noise, waves, birds, waterfalls, crickets, running water and 3 lullabys. Choose the sound according to your preferences and needs to create a quiet environment for you to quickly fall asleep and have a complete rest. B-style Product parameters: Model: Q3 Color: white Material: ABS + silica gel Voltage input: DC5V = 0.5A Power: 1W Battery capacity: 300mAh Use time: 23 hours (about 36 hours) Charging time: 1 hour Certification: CE, FCC, Rosh Product weight: 66g Package weight: 125g Product size: 93 * 80 * 28mm Package size: 158 * 106 * 31mm Outer box size: 47 * 35 * 45.5cm Packing quantity: 96pcs Gross weight: 13.5kg (2) Sleep meter function: 1. 10 pieces of sleep music: white noise, Lullaby 1, cricket call, wave sound, clock sound, bird call, heartbeat sound, Lullaby 2, running water sound, Lullaby 3 Product list: 1 * host 1*usb 1 * English manual 1 * Lanyard 1 * color box