Suitable for electric guitar or acoustic instruments with piezoelectric pickups, supported instruments with both active and passive pickups.      2.4GHz wireless system with Ultra-low latency under 5ms and ''24-bit/48kHz'' audio broadcasting offers accurate sound and delivers a full 20Hz-20kHz frequency response to give you solid reliable connection and great sound quality.      4 individual channels which support up to 4 units simultaneously,one transmitter can transmit signal to several receivers at the same time.      Compact, dependable and intuitive air plug system provides great compatibility for guitarist wherever they go. .Air plug with power saving mode preserves battery life during long playing sessions,battery life up to 5 hours.      Air plug wireless system include transmitter, receiver and power cable Charging is achieved easily via USB wall charger or PC and both the transmitter and receiver can be charged simultaneously with the included split charging cable.         Features:          4 individual channels, allows 4 gears work simultaneously      Ranges up to 45 feet      Less than 5ms latency      Power Saving mode.      5-hours long battery life      Suitable for electric guitar, acoustic instruments with piezoelectric pickups          Specifications:          Effective Distance: 15 meters      Latency: Less than 5ms      Frequency Response: 20-20K Hz,+1dB/-3dB      Total Harmonic Distortion: 103dB      Frequency Band: 2.4G Hz ISM Worldwide      Bit Deep: 24bit      Sample Rate: 48KHz      Dimension: 117mm(D)*42mm(W)*30mm(H)      Accessories: USB cable, Owners Manual, Portable Package