Feature:1. High Sound Fidelity: The white noise sound machine delivers excelentl sound fidelity, providing a realistic sound experience that helps create a soothing environment. Its built in sounds are carefully designed to compete with real life settings, making it suitable for relaxation or sleep.2. 20 Calming Sounds: Enjoy a selection of 20 calming sound sources right out of the box, including 5 white noise tracks, 5 pieces of soft music, 9 nature sounds, and 1 heartbeat sound. There's no need for downloads or connections, simply switch it on and start enjoying the soothing sounds.3. Long Lasting Battery Life: Equipped with a 1000mAh Li battery, the baby kids sleep machine offers an impressive battery life of 9 to 14 hours on a single charge. It takes just 3 hours to fully charge, allowing for extended use without needing to be plugged in, making it suitable for travel or bedtime routines.4. User Friendly Features: The travel sleep white noise machine is easy to use straight out of the box, with no WiFi or additional network setup needed. It has a maximum operating range of about 20 meters, providing flexibility for placement around your home, office, or while on the go.5. Convenient Timer And Low Battery Alerts: Users can set a timer for play duration with four options, 30 minutes, 60 minutes, 90 minutes, or turn it off manually. Additionally, the low battery alert system will emit a beeping notification when power is running low, ensuring you always have sound when you need it and can recharge in time.Specification:Item Type: White Noise Sleep MachineModel: SN-BZY01Material: ABSInput Voltage: DC5V 1ABattery: 3.7V 1000mah Li Battery x 1 (Included)20 Sounds: 5 White Noises, 5 Light Music, 9 Nature Sounds, 1 Heartbeat Sound.Package List:1 x White Noise Sleep Machine1 x USB C Data Cable1 x Manual