1.ADVANCED BLUETOOTH V5.0 RECEIVER: Bluetooth Car Adapter is not only for car,it is also could connect with your wired headphones via 3.5mm audio cable/adapter to help you enjoy the wireless Bluetooth headphones.^ 2.DUAL CONNECTION: could connect two Bluetooth devices at once and the Bluetooth range up to 30 feet in open space without obstacles.^ 3.EXTRA-LONG PLAY TIME: Built-in battery provides up to 10 hours? play and talk time, 120 hours? standby time, only takes 1.5 hours to fully charge it.?NOTE:Please be sure the charging input voltage to do not over 5V and do not use fast charger.?^ 4.EASY CONTROL: You can answer phone calls or control music on the receiver. Change volume, play/pause/skip music, answer calls, redial the last called number with ease.( NOTE: This receiver doesn't turn on automatically with your car.)^ 5.WIDE COMPATIBILITY: Compatible with most Bluetooth enabled devices like smartphone, MP3, tablet, etc, ideal for home or car audio systems.