Wireless transmitter and receiver can be used for electroacoustic instruments such as guitar, bass, violin and so on.Features:Wireless transmitter and receiver set for electroacoustic musical instruments like guitar, bass, etc.Anti-interface and ultra-short delay, giving you the finest music sound.Foldable body, more convenient for using and bringing.Built-in rechargeable lithium battery, long working hours, and comes with USB cable for convenient charge.Plug and play, simple to use. Compact size and lightweight, easy to carry.Specifications:Frequency bandwidth: 20Hz-20kHzTransmission delay: less than 4msTransmitter battery: 1 * 3.7V 600mAh rechargeable lithium batteryReceiver battery: 1 * 3.7V 600mAh rechargeable lithium batteryCharge port: micro USBItem size: 125 * 40 * 25mm / 4.9 * 1.6 * 1.0inItem weight: 39g / 1.4ouncePackage size: 147 * 106 * 45mm / 5.8 * 4.2 * 1.8inPackage weight: 204g / 7.2ouncePacking List:1 * Transmitter1 * Receiver1 * USB Cable1 * User Manual