Feature: 1. 26 Kinds Of Sounds: Sleep sound machine has white noise, waves, birdsong, waterfall, cricket, running water and 2 lullabies, etc. Choose the sound according to your preference to create a quiet environment. 2. Soothe Baby: The calm voice of white noise machine is able to soothe the baby fidgety and anxious mood and make the baby have a better sleep quality. 3. Save Space: White noise maker has a portable design, which can be placed on the bedside table, or easily put into a bag or suitcase. It is the perfect travel companion. 4. Automatic Settings: Sound white noise machine will automatically restore your previous sound, light, timer and volume settings, which is convenient for you to use. 5. Application: Light white noise machine is small, easy to carry, suitable for home, office or travel, and it is non battery powered, so it needs to be connected to the power supply when in use. Specification: Item Type: Sound white noise machine Material: Plastic Size: Approx. 11.9 x 7.1 x 3.6cm / 4.7 x 2.8 x 1.4in Type Of Battery: 5V 300mAh lithium battery (built in) Endurance Time: 15 hours Charging Time: 1.5 hours How to Use 1. Light, vibration key: press the M key to make the nightlight always on (long press the M key in the always on mode can adjust the brightness of the night light), then press the breathing light, then press the power off, and keep circulating. Press the M key twice continuously to start the motor vibration mode, and then press the M key twice continuously to turn off the vibration mode, and keep circulating. And the light vibration mode can be turned on at the same time. In each mode, you can press the timing key to turn off the machine at a fixed time (the white light turns on for 15 minutes, the red LED turns on for 30 minutes, the green light turns on for 60 minutes, and the blue LED turns on for 90 minutes). If not, you have to turn off the machine manually.2. Volume key: When white noise is turned on, press the previous song for a short time, and press the volume down for a long time.3. Power key: Long press the power key to turn on and off the machine with white noise, short press it to pause the playback, and remember the white noise and volume of the last shutdown when you turn it off and then turn it on, with memory function.4. Light, vibration, white noise under any mode. Press the timer button, the white light turns on for 15 minutes, then the red LED turns on for 30 minutes, then the green light turns on for 60 minutes, then the blue LED turns on for 90 minutes, and then the power is turned off for a long time. When the timer is up, all the devices will be turned off in any mode.5. There are 26 sound sources: 1 white noise, 2 white noise, 3 white noise, 4 white noise, 5 white noise, 6 vacuum cleaner, 7 fan, 8 hair dryer, 9 industrial fan, 10 seas, 11 streams, 12 drops of water, 13 indoor fish tanks, 14 rain, 15 intrauterine heartbeat, 16 hush, 17 insects chirping in summer night and 18 birds chirping.Charging status:When USB is plugged in, the first white light flashes when the power is below 20%, and the other lights don't light up. When the power is charged to 20‑40%, 1st white light turns on and doesn't flash, and 2nd red LED turns on and doesn't flash when the power is charged to 40‑60%, and 3rd green light turns on. When the power is charged to 60‑80%, the white light turns on and the red LED turns on.Low electric reminder function:When the battery is low, all the 4 lights of white, red, green and blue flash at the same time, and then turn off after flashing for 10 times, which will remind you that you need to charge.. Package List: 1 x Sound White Noise Machine 1 x USB Cable1 x Manual1 x Lanyard