Plug and play, easy to use, small in size, light in weight and easy to carry.Built-in rechargeable lithium battery, long working time, equipped with USB cable, easy to chargeSupport 4 groups of devices to be used at the same time, the maximum transmission range can reach 50 metersUltra-high frequency 730mhz original sound transmission, anti-interference, ultra-short delay.Wireless transmitters and receivers can be used for electro-acoustic musical instruments such as guitars, basses, violin, etc.parameter:Audio response range: 20Hz-20kHzTransmission range: max.50m (barrier-free); 30m (through walls)Transmission delay: less than 4msPower supply: Built-in 3.7V 600mah rechargeable lithium batteryCharging time: 2 hoursContinuous use time: 4 hoursCharging port: USBsize:11x4.5x1.5cm / 4.3x1.8x0.6 inchMaterial:ABScolour:blackPackage Contents:1 * Guitar transmitter1 * Guitar receiver1 * power cableOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.