This machine is specially designed for sleeping and relaxation. It has 9 kinds of smooth and natural sounds, features white noise, wave sound, cricket sound, rain sound, birdsong, bicker and 3 lullabies, so that you can choose sounds according to your preferences and needs to create a quiet environment. It not only masks noise, improves sleep quality, but also is suitable for use at home, in the office, in a dorm, in a baby nursery or anywhere you want. A great helper for you! Features: 1. 9 kinds of smooth and natural sounds: It features white noise, wave sound, cricket sound, rain sound, birdsong, bicker and 3 lullabies, so that you can choose sounds according to your preferences and needs to create a quiet environment 2. Portable design: It takes up a small space on the bedside table and can be easily put into your bag or suitcase, making it the perfect travel companion. 3. Not just for sleep: our white noise sound machine not only masks noise, improves sleep quality, but also is suitable for use at home, in the office, in a dorm, in a baby nursery or anywhere you want. 4. Automatic shutdown timer: This white noise machine can be played continuously non-stop all night or there is an auto-off timer to set for 15, 30 or 60 minutes to conserve energy (Light display). 5. It features a light display and according to the light, you can adjust the breathing in 10 minutes to make your body relaxed. 6. It features built-in lithium battery and USB charging, can be used continuously for 30-36h for a full charge. Specification: Item Type: White Noise Machine Material: ABS Item Color: White Charge Method: USB Cable Input Voltage: DC5V=0.5-1.0A Power: 1W Battery: Li-ion18650-1200mAh Charging Time: 1-1.5h Use Time: 30-36h Charging Circle: 500 times Item Size: Approx. 8 x 8 x 3.3 cm / 3.1 x 3.1 x 1.3 inch Package Weight: Approx. 171 g / 6 oz Package Include: 1 * White Noise Machine 1 * USB Cable 1 * Manual Note: 1. Please read the manual carefully before use. 2. Please allow 1-3cm error due to manual measurement. Please make sure you do not mind before you bid.