Sennheiser SKP 100 G3 Plug-on Transmitter

Tech Specs - Product Page

The Sennheiser SKP 100 G3 Plug-on Transmitter easily plugs onto dynamic microphones with XLR connections transforming them into world-class wireless units when combined with EM 100 G3 or EK 100 G3 receivers. This compact and lightweight transmitter has a run-time of up to 8 hours on one 9V battery.

Unit works but display is blank, frequency unknown.