AKG WMS 40 Mini Instrument ISM2, UHF Wireless System with Bodypack, Non-diversity receiver with symmetrical jack output, Adjustable, HDAP Technology (High Definition Audio Performance), Up to 30 hours of use with 1x AA battery, LED function display on the transmitter, Low battery display on the transmitter, On/Off/Mute switch on the transmitter, Three status LED on the receiver, Frequency ISM 2 864.375 MHz, Requires no registration and is license free throughout all of Europe, Incl. Guitar cable