The Mace Brand Ergo LED Stun Gun emits a shock up to 1.69 microcoulombs and has a bright flashlight to help see in the dark. The LED is activated by depressing the round button located in the finger grip area. The LED can be used to distract an assailant or signal for help. To arm the stun gun, slide the arming switch forward to the ON position. The LED above the arming switch glows bright red when the device is ready. Mace Brand recommends charging for 2 hours after long periods of inactivity.