Whelen 295HFRSA Siren Amplifier Condition:* New surplus stock, no OEM Packagigng. Additional Notes:* Input Voltage: 12.5 VDC * Input Current, max.: 16 Amps, @ 15VDC, 5.5* Input Fuse: 20 AMPS * Speaker Impedance: 5.5 min.* Operating Temperature: -30C to +60C* Storage Temperature: -40C. to +70C * Humidity: 99% (non-condensing)Whelen 295HFRSA