These are new un used LCD digital panel meters.

Features
Description
The DPM 300 is a 4 1/2 digit LCD voltmeter with 12.5 mm (0.5") digit height. It features 200 mV and 2 V DC full scale readings, auto-zero, auto-polarity and a set of annunciators. The meter plugs directly into a DIL socket or can be panel mounted using a snap-in bezel and window. Connection to the meter is via two rows of pins.
By Selecting the right combination of resistors to can have up to a 2KV range, following ranges are avalible 
Data sheet will be provided with the display. Due to the nature of the item, returns not accepted as can not be held accountable for someone miswiring the display up

Excellent and accurate panel meter, ideal for Power supply projects and metering projects