Product Button Description: 1. Switch button: long press for 1 second to switch on and off.  2. Projection mode key: Short press to switch the music rhythm—7-color beating—7-color breathing—7-color gradual change (4 projection lamp modes).  3. Night light mode key: Short press to switch night light mode, turn off the projection lamp, short press again to cycle through the night light color mode (orange-cyan-purple-turn off night light-white), long press for 1 second to adjust the brightness of the night light ( 60%-20%-100%).  4. Motor and laser light keys: short press to adjust the watermark motor speed 60%-100%-off -40%, long press for 1 second to switch on and off.  5. Next song/volume down button: short press to select the next song, long press to continuously decrease the volume.  6. Previous song/volume decrease and increase: short press to select the previous song, long press to continuously increase the volume.  7. Laser starlight.  8. Projection lamp.  9. Ring night light.     Specifications: Laser light power: <1mW.  Projection LED power: 2*1.5W.  Night light LED power: 18*0.2W.  Power input: USB type C 5V 1A.  Projection area: 10-50 square meters.  Working environment: temperature -10-40 degrees Celsius, humidity 0-95% non-condensing.     Caveat: The power requirement of this product is USB TYPE DC5V/1A. Please use the adjustment device once it is within the range. Otherwise, this will shorten the life of the product.     Note: For your safety, please read this manual carefully before using this product.  Please avoid looking directly at the laser light and projection lamp with your eyes.  Minors should use this product under the supervision of an adult.     Quick Use: 1. Use the included USB TYPE C power cord to connect a 5V 1A or higher USB power adapter.  2. Press the power button for 1 second until the light turns on.  3. Use a mobile phone or computer Bluetooth pairing to connect 'BT-UFLiSPK'.  4. Choose your favorite projection or night light mode.     Package Included:  1 x Starry Sky Projector.  1 x Remote Controller.  1 x USB TYPE-C Cable.  1 x User Manual