The UGREEN Bluetooth audio receiver/transmitter enables wireless connectivity via a 3.5mm jack and USB charging. I used it once. After that, I haven't had a chance to use it. Model number is CM403. - Brand: UGREEN - Type: Bluetooth audio receiver/transmitter - Connection terminal: 3.5mm jack - Charging method: USB charging, with cable - Features: Wireless connection / Long-distance transmission / Connects to two devices simultaneously / Small and lightweight *This item has been stored by an individual. Please understand this before purchasing. *I inspect the item carefully, but please understand that there may be oversights. Thank you for viewing.