LED Source:2835 LED Battery type:3.7V 4400mAh Li-ion Battery(18650) / 4*D Battery (not included) Dimension:145(D) x 260 (H) mm Max output:4D-1000lm / 18650-1500lm Funciton:High-Mid-Low-Red -Red flash / Long press for stepless dimming Material:Plastic+TPR