This audio transmitter is easy and convenient to use because it is plug play and driver-free as well as supports TF card. With the adoption of Bluetooth-compatible5.0 technology, this audio transmitter has fast and low-latency signal transmission as well as lossless and HiFi sound effect. It is constructed of ABS material. The length of this product is 6.9cm, width is 6.9cm and thickness is 2.4cm. This wireless transmitter is suitable for being used in laptop, loudspeaker, smartphone, computer and so on. Item Name: Wireless Transmitter Material: ABS Bluetooth-compatible Solution: 5.0 EDR, A2DP, HSP, AVRCP Frequency: 2.4GHz-2.48GHz Bluetooth-compatible Transmission Distance: ≤10m Bluetooth-compatible Receiving Distance: ≤10m Charging Voltage: DC 5V Bluetooth-compatible Receiving Function: Connect 1 Mobile Phone Bluetooth-compatible Transmitter Function: Connect 1 Pair of Earphones Transfer Rate: 100Mbps Features: Driver-free, Quick Transmission, Stable Output Size Details: 6.9cm x 6.9cm x 2.4cm/2.72" x 2.72" x 0.94"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. The screen can display 8 Device Names to be paired (transmit) and the paired mobile phone name (receive). Package Includes: 1 x Audio Transmitter 1 x Lotus Head Audio Cable 1 x 3.5mm Audio Cable 1 x Data Cable