Features: Wireless transmitter receiver is designing with metal case, drop-proof and collision-proof with USB power cord. Standard connectors provide more compatibility, which can easily connect to TV and transmit sound wirelessly to active stereo, soundbar and more. Adopts 2.4ghz technology and external antennae, almost no delay, higher transmission efficiency and more stable transmission. Powerful interferences resistant technology, enjoy excellent sound quality whether home or in office. Both transmitter and receiver come with sound adjustment knobs that support two-way control. Commonly used in home, education, square broadcasting, stage performances and concerts and other scene. Specifications: Material: ABS Color: Black Transmitter Size: approx. 24x11cm/9.45x4.33inch Transmission Distance: up to 50m/160ft（opened area) Package Includes: 1 Set Transmitter Receiver with Antennae 2Pcs USB Power Cable note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.