Feature: 1. Helps cover external noise and reduce internal distractions, creating an environment for deep sleep. 2. Including the sound of fans, white noise, waves, rain, heartbeat, thunder, meeting different demands. 3. Intelligent noise reduction, clear sound, bring the soothing effects of white noise and other music into full play. 4. Simulate the uterine environment to help infants sleep, and the white noise has similarities to the sounds they are familiar with. 5. A variety of natural sounds for different groups of people. High quality sound source and unique acoustic principle design. Specification: Condition: 100% Brand New Item Type: White Noise Sound Machine Material: ABS, PC Color: White Type: Bluetooth Type Battery Type: Lithium battery Battery Capacity: 1200mAh Power Supply Type: USB power supply Sound Type: fan, white noise, waves, rain, heartbeat, thunder Timing: 30 minutes, 60 minutes, loop play Connect Bluetooth: Long press the third button from the left to hear "White Noise". Turn on Bluetooth mode and find "White Noise" to connect successfully. Long press again to turn off Bluetooth mode.. Package List: 1 x Host 1 x USB Cable1 x Manual