Item No.: SL-W6915 Bulb:20W COB LED (6000-7000K) Battery:7.3V 4000mAh Li-ion battery Function:1.hold press for ON , hold press for OFF 2."-", "+" controls different brightness, 100%-80%-60%-40%-20% ; 3.hold press , connect to electronic device , play music Max output:2000 Lumens(High)/400 Lumens(Low) Run Time: 1.6 hrs/8 hrs Charging Time:4 hrs Power Adapter:8.4V 2.5A Size:210X137X64 cm N.W.: 1020 g How to Use : Press Bluetooth button To connect to other electronic device (ie I phone, I pad) to play the music. The Bluetooth item is ZF6915 , search for it. Press the Bluetooth button , the pilot lamp will strobe always until it connects to the electronic device succefully , then the pilot lamp will be ON. When it is cancelled to connect , the pilot lamp will turn to strobe again. No operation in 10 minutes, it will disconnect and turn OFF automatically. 1.Swvel stand base can rotate 180° ; 2.Power bank function 3.Power indicate