Features: Bluetooth-compatible Audio Transmitter with maximum range up to 80ft (20m) line of sight. (10M without interference or obstruction). USB Adapter with advanced Bluetooth-compatible 5.0 technologies, its USB audio transmitter is backward for Bluetooth-compatible 4.2 / 4.0 / 3.0 / 2.0 and can offer more stable wireless connection to your devices. The USB Audio Adapter can comfortably enhance your non-Bluetooth-compatible devices with the audio function. Your Bluetooth-compatible Audio Transmitter Dongle requires no driver, no need to manually download and install any drivers, just plug and for play. (No drivers for windows XP, 7,10, macOS, Linux). Specifications: Material: ABS Color: black Bluetooth-compatible version: 5.0 Universal interface: USB2.0/3.0/4.0/4.2 Acceptance range: 10-20m Transmission speed: 3mbps Frequency range: 2.4GHZ (2402-2480MHZ) Size: approx.17x6x30mm/0.67x0.24x1.18in Note: 1. There may be small deviations in size due to manual measurement, different measurement methods and tools. 2. The for image may not reflect the actual color of the item due to different shooting lights, angle and display monitor. Package includes: 1 x Bluetooth-compatible Audio Transmitter Receiver