Built in protection turns off USB charging and prevents your parked vehicle's LFP (LiFePO4) or AGM (Pb) battery from draining - starts back up when vehicle engine fires up Creates weatherproof seal against inserted USB cable, or 'rideproof' cap protects USB port not in use - worry free phone, camera or GPS charging in any weather Charges 2x USB devices with up to 3300mA current available to share - charge current adapts to each connected device for safe recharging The portable 3300mA dual USB charger, with 90? elbow BIKE plug connector that fits your BMW and Triumph motorcycle Connects to 12 mm DIN/BIKE 12V socket found on BMW and Triumph motorcycles. USB 3.3A DUAL CHGR BMW