Not charged, but works.

The MDU is a microprocessor controlled signal level meter designed for use in multiple dwelling unit and wireless communications applications. It receives all Cable VHF channels, including MDS 1 and MDS 2, all UHF off-air channels, and DirectTV satellite transponder channels 1 - 32. For all installations, the MDU powers the downconverter or LNB. The amplitude readout is a high torque analog meter movement that is extremely fast responding. The MDU is compact, lightweight, and contains a husky
nickel-cadmium battery pack that will power both the unit and the downconverter/LNB for hours. Both analog and digital modulation formats can be read.

What you see is what you'll receive.

Let me know if you have any questions!