USB Wifi Dongle -USB Bluetooth Adapter Highlights Generic Brand USB Bluetooth Adapter Description: Function: Bluetooth audio receiving and transmitting 2 in 1; Built-in noise reduction HIFI sound quality; Transmission signal distance: 10-15m; Fully compatible with automatic matching; One-button mode switching, receiving blue light, emitting red light; Input interface: 3.5mm; Input voltage: DC / 5V; No need to drive, plug and play; No built-in battery, external power supply; Specification: Material: Plastic Size Chart: Size: Approx.43x21x11mm/1.7x0.8x0.4inch Package includes: 1 piece bluetooth transmitter receiver Note: All dimensions are measured by hand, there may be a little deviation. Color may vary slightly due to the color setting of each monitor. Thank you for understanding. Please enjoy your happy shopping time!