Small Size 3.5mm Car Wireless Audio Receiver Convenient Auto BT Audio Receiver Portable Car Driving Handsfree Call Car AUX Accessory This product makes it easier to answer your phonecall while driving. Keys design is simple, easy to operate, driving safer. Features: Colorful power indicator for timely recharging. BT5.3, higher transmission efficiency and more stable performances. Connect your mobilephone, navigation more clearly, and drive more safely. A variety of devices plug-and-play, receive BT signals, and output them to audio headsets and other devices through AUX audio. Large capacity battery for long working time. Multiple audio playback modes: AUX interface+memory card playback+BT 5.3 reception. 10m transmission distance. Widely compatible, audio devices with AUX input interface can be used. Specifications: Color: black BT: 5.3 Transmission speed: 20Mbps Working frequency: 30MHz BT distance: ≤10m Working current: 15-20mA Battery: 3.7V, 280mAh Item size: 59 * 28 * 15mm / 2.3 * 1.1 * 0.6in Package size: 128 * 90 * 21mm / 5.0 * 3.5 * 0.8in Package weight: 50g / 1.8ounce Packing List: 1 * Audio Receiver 1 * USB Cable 1 * Connector 1 * User Manual