Portable wireless audio transmitter & receiver, about 50m effective transmission range. Adopts and with SMD electronic components, fast transmission. Supports 1-6 sets working at the same time, strong anti-jamming. Compact and , convenient to store and carry around. Suitable for electric guitar, bass, electric violin and other electroacoustic instruments. COLOR: black Material: plastic Comes with a 6.35mm to 3.5mm adapter for connecting with different audio devices. Working Frequency: VHF 200-271MHz Transmission Range: About 50M (No obstacle) Frequency Response: 60Hz-18KHz Working Temperature: -10 Celsius -50 Celsius Power Supply: 2 * AA Batteries for each (Not included) Item Size: 11 * 3.5 * 2.5cm / 4.3 * 1.4 * 1in Item Weight: 35g / 1.2oz(single, excluding batteries) Note: Batteries are not included. The guitar and speaker showed in the picture are not included. Package List: 1 * Transmitter(Green LED) 1 * Receiver(Red LED) 2 * Antennas 1 * 6.35mm to 3.5mm Adapter Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.