Features: The transmitter with 6.35mm plug works well with most guitars and basses. Built-in 2 different channels option for you to use 2 system at one stage. Simple to use. The transmitter and the receiver are matched by code, power on and play. UHF frequency and FM high fidelity coding technology to perfectly transmit the signal and restore the really nice tone without any compression or distortion. Delay time within 5mS gives you wonderful music experience. With indicator for connecting, recharging and low power alarm. Comes with a USB cable and antenna. Specifications: ARU-02 Transmitter: Channel: 2 UHF Channels(A/B) Plug: 6.35mm Mono Plug Frequency: 731.7MHz / 717.3 MHz Power: >10dBm Signal Noise Ratio: <-85dB System Frequency Response: 40Hz~18KHz+-3dB Delay: <5mS Distortion: <0.5% Max. Transmission Distortion: >20m(no obstacle) Power Supply: 3.7V/1000mAH Li-battery & 5V USB Cable Work Hour: 8 Hours(full recharged) Charging Time: <3 hours Transmitter Size: 9 * 2.5 * 2cm / 3.6 * 1 * 0.8in Transmitter Weight: 47g / 1.7oz ARU-02 Receiver: Channel: 2 UHF Channels(A/B) Plug: 6.35mm Mono Plug Sensitivity: <-110dBm Signal Noise Ratio: <-85dB Power Supply: 4 * AA Batteries(not included) or 5V USB Cable Audio Cable Length: 90cm Receiver Size: 13.5 * 9 * 3cm / 5.3 * 3.6 * 1.2in Receiver Weight: 129g / 4.6oz Package List: 1 * Transmitter 1 * Receiver 1 * USB Cable 1 * Antenna 1 * User's Manual Note: The amplifier and guitar showed in the picture are not included. Please pay attention that the transmitter plug can't be used for the audio interface which is on the top of guitar with concave design(showed in the picture).