SecurityIng Powerful and Wonderful 3000LM 5X T6 LED Flashlight with Waterproof & Self-Defense Function 3 Switch Modes Super Bright T6 LED Torch for Biking & Camping Outdoor Activities (Black) With 5X Cree XM-L T6 LED, its brightness can be up to 3000LM. This flashlight is waterproof, you can not only use it at home, and the outdoors even is rainy. With the sturdy shell, it can be an attacking tool when you are in danger. Adopts the high efficient booster circuit, and can utilize the batteries in the largest extent. Power Source: 4x 3.7V 18650 Rechargeable Batteries (Not Included).