This is a belt pack transmitter for the DAP COM-42 wireless handheld set. You can connect it to a mono instrument (guitar), dynamic lavalier or headset via a 4-pin mini XLR connector. The belt pack also has 5 V phantom power and thus even supports condenser microphones.

The belt pack transmitter for DAP COM-42 gives you a choice of 99 selectable frequencies in a range of 606-630 MHz. This frequency range falls within the policy for wireless microphones for most European countries

During a show or presentation, you don't have to worry much about dropouts or lack of power. AA batteries last up to 6 hours, depending on the quality, and can be quickly replaced with new ones.