NITECORE MH12GTS 1800 LUMENS Fly Fishing BATTERY TYPE rechargeable lithium ion BATTERY Model Number Running Depth BATTERY TYPE rechargeable lithium ion BATTERY LIFE up to 1 hour Ceymar XT 640 6 KG 5 Mode: Morse code flash to signal for aid in emergency situations Location Beacon: Efficient flash to mark current position Light operated using a pair of switches Power Switch: Located on tailcap Metal side switch controls 5 brightness levels and 3 special modes Power indicator beneath the side switch indicates the remaining battery power Power indicator can also display the battery voltage Built in Li ion battery charging circuit with a micro USB port Rigid double layer tube design Convenient micro USB charging port allows included 18650 to be recharged internally U shaped tailcap helps prevent accidental activation ATR (Advanced Temperature Regulation) protection helps prevent overheating Reverse polarity protection prevents damage caused by improperly inserted batteries Tail stand capable