Designed to help improve precision and accuracy with any style or caliber of weapon, the Trijicon RMR Type 2 Adjustable was built to last. LED powered, the RMR Type 2 Adjustable operates with a CR2032 battery. Made of aluminum, the RMR Type 2 Adjustable is lightweight yet tough. Quick adjustments can be easily made with audible clicks. With eight available brightness settings, the reticle can be manually adjusted by pressing the plus or minus buttons on either side of the unit. To switch to auto-adjust mode simply press both buttons simultaneously and release. To save battery life, turn the optic off by pressing both buttons simultaneously and holding for 3 seconds. The RMR Type 2 Adjustable is tough enough for any military, law enforcement, or hunting endeavor. RMR Type 2 Adjustable FeaturesMagnification 1xLength - 45mmWeight - 1.2oz with batteryLED Source IlluminationDay Reticle Color - RedNight Reticle Color - RedHousing Material - Forged AluminumBatteries - (1) CR2032 Lithium BatteryBattery Life - Up to 4 years of continuous useAutomatic/Manual Brightness - 8 Adjustable Settings Trijicon 6.5 Adj Red RMR Type 2 - RM34 RM07-C-700681