Item Type: Car Music Receiver Material: ABS With Screen: Support BT Version: 5.0 Charging Voltage: 5V BT Frequency: 2.402-2.480GHz Working Hours: 10H Built in Lithium Battery Capacity: 300mAh (included) Charging Time: 2H Effective Distance of BT Microphone: 0.5-2Meters/0.5-2.2yd BT Transmission Distance: Straight Line 10Meters/10.9yd BT Sound Processing: with Digital Signal Processing/A2DP Function 1、Supported Functions: The car music receiver supports mobile phone BT hands free calling, mobile phone navigation, listening to music and other receiving modes 2、Wireless Reception: The car music receiver can receive BT signals and output to speakers, headphones and other devices through AUX voice frequency 3、10M Transmission: The car wireless adapter can transmit over long distances and has no barrier to transmission within 10M, so you can enjoy music no matter where you are 4、Compact and Portable: The car aux adapter has a refined appearance, which is compact and portable, so you can use the receiver anytime, anywhere 5、Convenient and Practical: The car aux adapter connects the BT connector to the car AUX interface through an adapter or an adapter cable (standard), and the BT connects to the car voice frequency 1 x Car Music Receiver 1 x 3.5mm Voice Frequency Cable 1 x Metal Plug 1 x Type C Charging Cable 1 x User Manual