From the seller:

Professionally maintained and teched prior to shipment. The PS-702 can supply up to two amps at 30 volts DC to two channels in a 1RU. This is sufficient to power up to 40 beltpacks, ten speaker stations, or 12 headset stations even under the most demanding conditions. Either channel is capable of supplying up to 1.2 amps. The full current capacity may be divided between the two channels. • Provides up to 2 amps in only 1RU • Supports up to 40 beltpacks, 10 speaker stations or 12 headset stations • Exclusive IFOS Intelligent Fault/  Overload Sensing for system reset • Front panel intercom line jack selectable for either channel • A+B Link switch for single channel operation • Balanced program input with global and individual channel controls • Universal power supply accepts  100-240V AC • Overload/fault indicator for each channel • Built-in test tone generator for set up and diagnostics • Switchable terminations for each channel • Works in parallel with other power supplies and main stations