2.4Ghz Wireless Guitar System Rechargeable Digital Guitar A9 Transmitter and Receiver for Violin Electric Bass GuitarWireless transmitter and receiver kit designed for electronic musical instruments such as guitar, bass, etc.2.4GH uncompressed wireless signal transmission, low noise and latency. Built-in rechargeable battery, long working hours and USB cable for convenient charging.270 degree rotatable 1/4 inch plug, available for instruments with input socket in different positions. Supports 4 sets of devices working at the same time, the maximum transmission range can reach 50 meters. Audio Response Range: 20Hz-20kHzFrequency: 2.400GHz-2.483GHzTransmission Range: Max. 50m (without barriers); 30m (Through Walls)Transmission Delay: Less than 12.5ms Power Supply: Built-in 3.7V 600mah Rechargeable Lithium Battery Charging Time: 2 Hours Continuous Use Time: 4-6 Hours Charging Port: micro-usb Size: 116x43x17mm Material: ABS Shell: Black Package Contents: 1 x Transmitter1 x Receiver1 x USB Charging Cable1 x User ManualOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.