Professionally designed for PICATINNY mounts, the KLARUS GL4 features an innovative removable slide rail mount with a mechanical lock for secure operation. 3300 lumens tactical flashlight with 370 meters of throw, 4 hour runtime. Adopts the USB C charging cable with a charging current of up to 2A, which greatly improves the charging efficiency. Multifunctional unique rat tail: integrated magnetic charging tail switch with compatible locking remote controlling, tactical operation with ease. The operation is convenient and simple, and it can be quickly installed and disassembled, which improves the user experience. Loosen the screws on the Rail Adapter with the included Hex wrench, align the adapter with the rail on the fifirearm and tighten the screws to lock the adapter onto the fifirearm rails. To remove the light from the adapter, turn the locking button on the adapter slightly to loosen the adapter, then slide the light away from the adapter. Turn the knob on the rail clip, the chute will automatically contact and lock, and then slide the tactical light out along the direction of the chute opening. The KLARUS GL4 inherits XT Series versatile tail switch that can connect a magnetic remote switch or ensures tactical handheld operation. Aviation grade aluminum alloy material, sturdy upgrade, 1.5m drop resistance, hard anodized surface treatment, more wear-resistant and more durable. IPX8 waterproof level, suitable for use in any situation. 2A charging current, faster charging. The indicator will turn on 5 seconds to indicate the battery capacity after power on. Green: 70% – 100%. Orange: 30% – 70%.