BT Speaker type: built in bluetooth speaker, built in battery, rechargeable, music box(8 songs) ,with remote controller, with USB cable, with 10 pcs films.Button Function:"power button(light button)" function:long press the "power button" for 2 seconds to turn on/off the led light. lightly press the "power button" to switch the light mode (white/yellow/blue/colorful gradient/breathing mode),"Rotation button" function:lightly press the "rotation button" to turn on/off the motor rotation, long press the "rotation button" to timing, the timing is 30 minutes, and it will automatically shut down after 30 minutes."music button" function:long press the "music button" to turn on/off the music box (Bluetooth), lightly press the "music button" to switch to next song.Warm Tips:1. when the battery is low, Bluetooth will automatically shut down.2. after bluetooth is disconneted from pairing, it will automatically turn off in 30 minutes. When Bluetooth in turned on, turned off, connected successfully, and disconned , you will hear the prompt tone. the BT name is "181".3. the bluetooth transmission distance is 4-10 meters.4. music box music will be played automatically when bluetooth is not connected.5. When using the remote controller for the first time, be sure to pull out the bottom insulating piece.Steps to replace transparencies:this product can replace the projection film, use a new projection film, first tear off the protective film of the projection film, twist and pull to remove the outer lamp cover, turn clockwise and pull up to remove the inner lamp cover, pull it vertically to remove the inner lamp cover cover the ring, remove the round lamp, take out the long projection film installed in the inner lamp cover, put it a new projection film, and put it back in reverse according to the same steps.