BG-1901 Bicycle USB Charging Speaker Front Lamp Multi-Function Cycling Equipment, Mountain Bike Headlight

1. Battery: Polymer lithium batterry 2000mah 3.7v
2. Power supply: 18650
3. 4 thgear: strong light, weak light, flashing, blastingflashing
4. Size: 10.2 x 3.0 x 2.5cm
5. Weight: 106g
6. Beads: Cree xpg