SUITABLE FOR WALKING/CYCLING/CAMPING/URGENTLY /EMERGENCY/SELF DEFENSE/HIKING. Features as listed with product: Large Capacity electrical current for good self defense Made of Aviation Grade Aluminum, HA III Anodic oxidation Super LED flash light saves energy and are more durable Chargeable Beautiful Design Note:The product is built-in Battery Specifications as listed with product: Power Input: DC3.5-4.2V Current:>2.5A Size: 165 X 35 X 28 (mm) Power Output: 1000KV Weight: 180 g