LED Source: SMD Battery type: 3.7V 5200mAh Li-ion Battery Dimension: 50.6(L) X 50.6(W) X 500(H) mm Max output: 2000lm Function: Main light 40%: 750lm - Main light 100%: 2100lm / 4-level color temperature adjustment / Motion sensing RunTime: 3.5h Material: Plastic+TPE