The transmitter shall be a miniature wireless transmitter for direct connection to such instruments as guitars, bass guitars, and keyboards. It shall feature an on/mute/off switch, battery status LED, and input gain control. The transmitter shall provide charging contacts to allow powering by AAA size 1.5 V dry or rechargeable batteries at the user's option. The transmitter's audio bandwidth shall be 40 Hz to 20 kHz, its carrier frequency range 710 MHz to 865 MHz, size 76 x 20 x 28 mm, weight without battery 28 g, RF output 5 mW (ERP). It shall be enameled black with a color-coded battery compartment lid.
