Features: Digital wireless system(transmitter + receiver) for musical instruments like electric guitar, bass, etc. Adopts UHF wireless technology, with strong anti-interface ability and stable signal transmission, less than 2ms delay. Supports using multiple wireless systems at the same time without interfering with each other, and effective transmission range is up to 50M. 220° rotatable 6.35mm plug, suitable for different musical instruments and device, super flexible to use. Built-in rechargeable lithium battery, long working hours; comes with a dual-ended USB cable for conveniently charging the transmitter & receiver simultaneously. Specifications: Frequency Response Range: 30Hz-16kHz Frequency Range: UHF 903-924MHz Dynamic Range: ≥90dB Transmission Range: Max.50M (No obstacle) Transmission Delay: Less Than 2ms Power Supply: Built-in rechargeable lithium battery(3.7V 600mA) Charge Port: Micro USB Item Size: 9.3 * 4 * 2.9cm / 3.7 * 1.6 * 1.2in Item Weight: 77g/ 2.7oz(transmitter + receiver) Package Size: 14 * 12.5 * 3.5cm / 5.5 * 4.9 * 1.4in Package Weight: 228g / 8oz Package List: 1 * Transmitter 1 * Receiver 1 * USB Charging Cable 1 * Users' Manual(English & Chinese)