Product name: Car bluetooth receiver Size:32*12*10mm/inch (approximately) Color: As shown in the figure Features:The product is a single-receiver model with a built-in microphone that can make Bluetooth hands-free calls. Both the USB port and the AUX port can output audio. Pairing and How-To Plug the Bluetooth adapter into the USB audio speaker device socket Turn on the device, the blue light flashes Search for Bluetooth devices, connect to BT-DONGLE devices and pair them Once the pairing is successful, you can play music. 1. Product specifications Model: BT60 Technology: BT5.0, AVRCP (receiver mode only), A2DP Operating range: Maximum 10 meters/33 feet (no obstruction) Pairing name (receiving mode): BT600 Receiver mode: blue LED light is on Attention: 1. As we all know , the different computers display colors differently, the color of the actual item may vary slightly from the following images. 2.Please allow 1-2cm measuring deviation due to manual measurement. Shipment includes: 1 pcs