Onite Disco DJ Stage Lighting LED RGB Crystal Rotating Special Effects Lighting, Aux Input TF Card Music Player and Wireless Bluetooth Speaker (Black) Stage lighting - Fascinating Rotating LED Crystal Led Bulb enable the colorful stage lighting. Bluetooth audio - 10 meters receiving distance allows it works as home party equipment controled by remote and smartphone. Multi-usage bluetooth speaker - Enable directly playing MP3 files in TF card or , and enable mnemonic radio channel playing as well. The built-in battery - 1050mAh chargeable lithium battery included, so you can use in outdoor without worries about the power supply. Trouble-shooting: If you don't know how to use it, pls feel free to contact Onite. We will send you PDF instruction.