Features: UHF Guitar Wireless System Transmitter Receiver. Wireless transmitter & receiver set for electroacoustic musical instruments like guitar, , etc. UHF original sound transmission, low latency, no signal loss, and low noise. Built-in rechargeable lithium battery is 500mah for long service for time. It is available for most electric musical instruments with popular 6.35mm jack. Specifications: Material:Metal Color:Black Power Supply: Built-in 500mAh rechargeable lithium battery Frequency Range:636MHz-799.5MHz for mixers, amplifiers, stereos, desktop computers and other equipment. Package Includes: 1x Transmitter 1x Receiver 1x Charging Cable note: Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!