Featuresr blurtooth laser projectorblp spreads thousands of green and red dazzling stars covering the ceiling and walls with blue cloud backgroud wihile enjoying the musicr laser oprating mode auto laser beams change automatically and comfortable sound laser beams is activated by soundr equipped with built in 2600mah gp battery the use time can be up to 15 hours without a breakr the customized diaphragm makes a wonderful base effect equipped with special motor the laser spot and led