Plug and play, easy to use, small in size, light in weight and easy to carry.<br> Built-in rechargeable lithium battery, long working time, equipped with USB cable, easy to charge<br> Support 4 groups of devices to be used at the same time, the maximum mission range can reach 50 meters<br> Ultra-high frequency 730mhz original sound mission, anti-interference, ultra-short delay.<br> Wireless mitters and receivers can be used for electro-acoustic musical inst ents such as guitars, basses, violin, etc.<br> parameter:<br> Audio response range: 20Hz-20kHz<br> mission range: max.50m (barrier-free); 30m (through walls)<br> mission delay: less than 4ms<br> Power supply: Built-in 3.7V 600mah rechargeable lithium battery<br> Charging time: 2 hours<br> Continuous use time: 4 hours<br> Charging port: USB<br> size:11x4.5x1.5cm / 4.3x1.8x0.6 inch<br> Material:ABS<br> colour:black<br> Package Contents:<br> 1 * Guitar mitter<br> 1 * Guitar receiver<br> 1 * power cable<br> Only the above package content, other products are not included.<br> Note: Light reflection 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.