Wireless Guitar System 20Hz-20kHz Wireless Guitar Transmitter Receiver Built-in Rechargeable Lithium Battery?Used For Electric Guitar Bass Violin

??? Easy to use, plug and play. Can be used for a variety of occasions. ?Audio Response Range: 20Hz-20kHz uncompressed digital transmission. ?Transmission Range: Max.50M (No obstacle); 30M (through-wall). ?Transmission Delay: Less Than 4ms. ?Power Supply:Built-in 3.7V 600mAh rechargeable lithium battery. ?4 pairs of devices work: non-interference uhder the same circumstances. ?Item Size: 4.3 * 1.8 * 0.6in (11 * 4.5 * 1.5cm ). PACKAGE LIST: 1 * Transmitter. 1 * Receiver. 1 * User Manual. 1 * USB Charging Cable. If you meet any problems, please contact us, we will solve it as soon as possible to ensure 100% customer satisfaction experience.