Features: 1. Portable wireless audio transmitter and receiver with an effective transmission distance of approximately 50 meters. 2. Using SMT technology and SMD electronic components, the transmission speed is fast, ultra-short delay, delay is less than 2.5ms, easy to use, plug and play. 3. Support 1-6 sets of work at the same time, strong anti-interference. 4. Compact and lightweight, easy to store and carry. 5. Designed for most electronic musical instruments and electric guitars, etc. Specification: Condition: 100% Brand new Item Type: Audio Transmitter Receiver System Operating Frequency: VHF 200-271MHz Transmission Range: About 50M (accessible) Frequency Response: 60Hz-18KHz Working Temperature: -10℃-50℃ Frequency Band: CH02-CH04 Power: 2 x AA batteries (not included) Size: Approx. 11 x 3.5 x 2.5cm / 4.3 x 1.4 x 1in Weight: Approx. 157g / 5.5oz Package List: 1 x Transmitter (green LED) 1 x Receiver (red LED) 2 x Antenna 1 x 6.35mm to 3.5mm Adapter Note: 1. Battery is not included 2. The guitar and speakers, etc shown in the picture are not included. .