Wireless audio streaming system: The Bluetooth receiver C52 upgrades home speakers and car radios to Bluetooth speakers without Bluetooth functionality, so you can enjoy music wirelessly on your smartphone.Bluetooth 5.1 technology: The C52 Bluetooth receiver adopts the latest Bluetooth Ver5.1 low-power chip, which is not only suitable for older versions of products, but also has longer transmission distance and faster speed than Bluetooth 4.0.NFC function: When you turn on the NFC function of your phone and place it in the NFC detection area of this product, it is convenient and fast because you can connect with one click (your phone must have NFC function).Product specifications: size (6.8 x 6.8 x 2 cm), weight (45 grams), audio jack (NFC, TF card slot, 3.5mm auxiliary device, RCA auxiliary), reception range (within 10 meters), input voltage 4.8V to 5.25V.Easy to set up and use: Plug in the power, connect directly to pairing mode, turn on smartphone Bluetooth and select CB2. Color: As shown in the picture Package includes: 1 x Bluetooth adapter Attention: Due to manual measurement, please allow for a slight error. Please make sure you don't mind before bidding. 2. Colors may vary depending on the monitor, please understand. Hello, please pay attention to your shipping address when purchasing products. If your delivery information (such as name, street, house number, doorbell/email without name, etc.) is incorrect, the order will not be delivered correctly