The Receiver P2R works either wired and wireless - or simultaneously in both control modes.FEATURES:[ 8 selectable frequencies per system, up to 4 compatible (country dependent)[ Frequency locator[ Built-in headphone limiter[ Integrated cable management[ High-impact plastic chassis[ 1/4"" Line input jack with high/low gain[ switch[ Operating Controls: Volume knob, Frequency select [ LED Indicators: Power, RF reception, Frequency, Limiter, Low battery [ power supply: 9V battery[ battery works 4-6 hours (wired/wireless)[ size (H/W/D): 122 x 73 x 32mm[ weight: 100g (w/o battery) ";
