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Please take out the battery and remove the sticker, charge battery fully before using. Diving flashliht will downshift automatically if battery power is not enough Please insert the battery correctly. Connect the USB cable into a computer or power bank or wall charger. Indicator become red when charging and turns to green after fully charge There are 2 O-rings to enhance the waterproof performance of the diving flashlight. the O-rings are pre-installed on the flashlight. The O-rings come with package are replacement of original ones when they're lost or broken.





