Feature: 1. Multifunction: White noise machine with rechargeable battery, 21 soothe sounds, customized timers, various volume levels, child lock for safety, and even memory function. 2. 21 Sound: White noise sound machine with 21 soothe sounds, including white noise sounds, baby lullabies and nature sounds. Turn it on to create peaceful sleep environment. 3. 500mAh Capacity: Baby sleep sound machine is built in a 500mAh battery for long endurance, which can lasts through the night and into daytime naps on a single charge. 4. Wide Application: Not only a sleep soother sound machine for baby and kids, but also an effective white noise machine for adults sleeping and relaxation. 5. Portable: White noise machine is small and lightweight, with a lanyard for easily hanging on the stroller or car seats, allow baby fall asleep easier and stay asleep longer. Specification: Item Type: White Noise Sleep Instrument Material: ABS Model: JL C301 Style: Key switch, built in 8 music, one click switch, timed shutdown 30 minutes,60 minutes, 90 minutes. Battery Capacity: Lithium Battery 500mAh (Included) Duration: 20 to 40 hours Size: Approx. 65 x 31 x 120mm / 2.6 x 1.2 x 4.7in . Package List: 1 x White Noise Sleep Instrument1 x Lanyard1 x Charging Cord1 x Manual