Feature: 1. 100m/328.1ft waterproof depth, easily capable of daily rain and seabed exploration. 2. There are strong light, low light, SOS three modes, suitable for various environments. 3. Adopt for 18650 1500mAh battery, long service life, easy to charge, durable and sturdy. 4. Hanging lanyard is included, conveniently carry and use underwater and prevent losting. 5. Compatible for diving, surfing, camping, sea exploration and other outdoor activities. Specification: Item Type: Waterproof FlashlightMaterial: Plastic+AlloyProduct Color: Black Weight: Approx. 192.0g/6.8ozMode: Strong light, low light, SOS Waterproof Depth: 100m Irradiation Angle: 60 degrees Endurance: 2-7H Life: 50000 hours Battery: Built-in Battery 18650 1500mAh How to use: 1. Rotate the front cover of the flashlight counterclockwise, and pull out the lamp holder and battery box 2. Remove the insulating sheet between the battery box and the battery 3. Put the battery box back into the flashlight and install the front cover 4. Long press the power button and turn it on, click to switch modes. Package List: 1 x Waterproof Flashlight(with Strap)1 x O Shape Ring1 x Manual