BoxWave Car Charger Compatible With JVC HA-FX39BT.Made for rapid charging your power-hungry HA-FX39BT and many other devices, the SwiftCharge Car Charger Plus safely and rapidly charges up to 3 devices using a USB-A and USB-C cable.The SwiftCharge Car Charger can SIMULTANEOUSLY charge your HA-FX39BT and two other devices at the same time! Two USB-Type C ports and one USB-A port will function independently at the rate of EACH device, to charge them safely at the fastest possible speeds.Two USB-Type C ports are able to charge devices at 5 TIMES faster than normal charging speeds, and the USB-A port is able to charge your third device at three times the average normal charging speed.Safely supplies energy for your HA-FX39BT along with MANY OTHER DEVICES including tablet computers, driving recorders, navigators, cameras, phones, and other smart devices.At only 3 inches long, you can fit the small charger in your bag or pocket. The SwiftCharge Car Charger fits PERFECTLY into your car's standard cigarette lighter port and makes for a powerful charging station.PROTECTS your HA-FX39BT against excessive currents, overheating and overcharging. Charging stops when the battery is full.