Plug and play, easy to use, compact size, lightweight and portable. Built-in rechargeable lithium battery, long working time, comes with USB cable for convenient charging. Supports up to 4 devices used simultaneously, with a maximum transmission range of up to 50 meters. Ultra-high frequency 730MHz original sound transmission, anti-interference, ultra-low delay. Wireless transmitters and receivers can be used with electro-acoustic musical instruments such as guitars, basses, violins, etc. **Parameters:** - Audio response range: 20Hz - 20kHz - Transmission range: up to 50m (open space); 30m (through walls) - Transmission delay: less than 4ms - Power supply: Built-in 3.7V 600mAh rechargeable lithium battery - Charging time: 2 hours - Continuous usage time: 4 hours - Charging port: USB - Size: 11 x 4.5 x 1.5 cm / 4.3 x 1.8 x 0.6 inch - Material: ABS - Color: Black **Package Contents:** - 1 x Guitar transmitter - 1 x Guitar receiver - 1 x Power cable Note: Light and display differences may cause slight color variation between the image and the actual item. Measurement error is allowed within +/- 1-3cm.