【Shake Awake】After about 2 minutes without sensing any motion，the sight will enter into sleep mode.Even the slightest movement will wake it up to the previous brightness setting. 【Battery Life】The battery life depends on the brightness setting of the dot. when you adjust to low setting, the battery usually lasts for 50000 hours. Even you use highest level, the battery also lasts for 2000 hours. 【10 Illumination Settings】This dot is 10 bright settings, it include 8 levels and 2 Night Vison red dot intensity. Setting 1 and 2 are used to with the night vision device. Please adjust the brightness level according to your needs. 【Specification】The red dot is made by CNC aluminum housing,6061-T6 standard. Shockproof 1000Gs, IpX67 waterproof up to 1 meter depth for 30 minutes. 【Quality Assurance】We provide a limited lifetime warranty form the date of purchase on parts and workmanship to the original purchaser.