FMA Manta Strobe Red Type 2 - Black Producer: FMA Weight:56 g Dimensions: 3.0 "(L) x 2.0625" (W) x 1.375 "(H) Weight: 1.5 ounces (w / o battery) Strength: (1) CR123 lithium battery materials: impact polymer Description: Infrared and Green Overt strobe light mode Base plate is shaped to fit to the curvature of modern combat helmets Positive one-handed operation with a tactile power switch and vibrating motor feedback Operation Instruction 1. Push the "Tail Cap Switch ON/OFF" button, the motor vibrates three times to let the operator know the strobe is active, the IR strobe function is active at the same time. 2. Change to visible light mode, press both "side switch" together, the motor vibrates three times and the visible light is active on mode 1 (light up 1/10s, slake 1s) 3. At VIS mode, you can press both "side switch" together to change from mode 1 to mode 5 (light up 1/10s, slake 1/5s), auto cycle to mode 1 after mode 5. Battery: CR123a (Battery not included) After Fitting battery will vibrate both sides of the keys pressed simultaneously, the green light flashes, press the back button, the green flash will be off while also flashing infrared .