Features: 1.UHF TECHNOLOGY: This guitar wireless system utilizes UHF digital transmission technology. This technology allows the sound to penetrate walls and prevents any frequency interference. 2.LIGHTWEIGHT AND COMPACT: Guitar wireless system has a lightweight and compact design that makes it very practical. 3.MULTI DEVICE SUPPORT: The wireless transmitter can support up to 99 devices without interfering with each other. 4.RECHARGEABLE BATTERY: Our wireless instrument system comes with a built in rechargeable battery and a double ended USB cable included in the package. The battery lasts up to 6 hours in full operating mode. 5.STABLE TRANSMISSION: Low sound latency, covers a distance of 30?50m, stable sound transmission and high sound reproduction. specification:Item Type: Guitar Wireless System Product Material: Plastic Battery Type: 2 x 300mAh Lithium Polymer Batteries (Receiver and Transmitter Shipped with Built in Batteries) Use: The Device Adopts Advanced Digital Transmission Technology to Ensure Strong Anti Interference Ability. Low Sound Delay, Can Cover A Distance of 30?50m, Stable Sound Transmission and High Sound Reproduction PackageList: 1 x Wireless Sound Receiver 1 x Wireless Sound Transmitter 1 x Dual USB Charging Cable 1 x Instruction Manual