ADTRAN solutions maximize performance, lower costs, and help companies achieve the best return on investment. ADTRAN is committed to achieving success for customers by offering "best-in-class" products with outstanding value. Let ADTRAN work for you. PRODUCT FEATURES: -54 VDC @ 6 amps output for multiple use; Modular connections for two backup battery packs; Modular power output connection; LED status for VAC, VDC, and battery charging; Full battery recharge in less than eight hours; Two PS/BC configuration options available; Fuse protection; Positive ground; Mounting hardware included; Completely automatic operation; Multiple protection features; Uninterrupted power output if backup battery connected; Meets NEBS Level 3 (all requirements of GR-63-CORE and GR-1089-CORE); FCC and UL 60950 compliant.