pTron Bullet 3.1A max. fast charging car charger with 3 USB ports and micro USB charging cable. Now, you can charge 3 devices simultaneously. Equipped with built-in protections against fire, overheating, overcharging, and short-circuit to safeguard the charging process. Charge your devices up to 20-30% faster than with a conventional charger thanks to a series of algorithms to establish what power level is needed at any time. PTron Bullet car charger is small in size and made of lightweight durable material to provide an amazing & fast charging experience to you. Compatible with all USB-powered devices including mobiles, tablets, cameras, GPS units, Bluetooth headphones & speakers, smartwatches & more. Charges steadily even on bumpy roads thanks to the wider circuitry contacts of stainless steel on both sides. Compatible Devices: All Smartphone & Tablets.