The Decode PS-1A is a low noise, phantom 48 volt microphone power supply. The PS-1A works with one 9 volt battery and has enough power to run high current microphones. the small size, light-weight, rugged construction and very low noise make the PS-1A a natural for powering microphones feeding DAT machines radio mics, tape machines, and mixing panels. Long battery life and a bright LED low battery indicator ensure that the microphone is properly powered during your recording session.Features:Low noise well regulated electronics and precision resistors are used to satisfy the most demanding Digital requirements.External power jack for studio use.LED blinks at turn on and turn off.Low battery indicated by steady glow of the LED.Simple drop in compartment for quick change batteries.Reverse battery to turn off (no drain)Internal -15 db pad switch. Specifications:Size: 1.25 x 3.0 x 4.0 in.Weight: 8.0 ozsUses one standard 9 volt alkaline battery.Voltage from 6.8 to 18 volts.Current from 3mA to 142 mA depending on the mic.Battery life (depending on mic load) from 8 to 76 hours.Voltage is 48 volts +3 volts.Current from 14 mA (direct short)Noise floor is under .01 mV AC.The LED lights at regular drop out.