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.