Bad Elf Pro+ (Plus) Bluetooth GPS Receiver Men Bottoms Thermal & Travel Underwear Nylon taffeta sleeve lining for 264654 Nylon taffeta sleeve lining for easy on and off far reaching light with a larger center spot beam that is ideal for close to medium range engagements Integral ambidextrous momentary and constant on switching provides easy instant activation Attaches securely to both Universal and Picatinny accessory rails IPX7 waterproof to 1 meter for 30 minutes High strength aerospace aluminum body is Mil Spec hard anodized for extreme durability Accepts optional pressure activated DG and XT remote switches for precision control without altering grip on weapon View All Features This GPS receiver Quickly acquires satellite lock without cell tower assistance