Wireless transmitter & receiver set for electroacoustic musical instruments like guitar, bass, etc. UHF 730MHz original sound transmission, anti-interface and ultra-short delay, giving you the best . Supports 4 sets of devices working at same time, one-to-one; and max. transmission range is up to 50 meters. Built-in rechargeable lithium battery, long working hours; and comes with USB cable for convenient charging. Plug and play, simple to use; compact size and , easy to carry. Color: black Material: ABS Audio Response Range: 20Hz-20kHz Frequency: UHF 730MHz Transmission Range: Max.50M (No obstacle); 30M (through-wall) Transmission Delay: Less Than 4ms Power Supply: Built-in 3.7V 600mAh rechargeable lithium battery Charge Port: Micro-USB Item Size: 11 x 4.5 x 1.5cm / 4.3 x 1.8 x 0.6 inch Item Weight: 140g / 4.8oz (for each) Note: The guitar and guitar amplifier showed in the picture are not included. Package List: 4 x Transmitter 4 x Receiver 4 x User Manual 4 x USB Charging Cable(Random Color) Only 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.