Key Features: 12V DC, 4CH 3A UPS Power Supply Box FTC Fuse, CE FCC Fuse Rating: 1.1Amp 90V~265V AC input Power on/off switch Surge protected, Regulated and filtered Battery Protection at low voltage: 9V~11V   Input Input Voltage: AC 100VAC/220VAC Input Voltage Frequency: 50/60Hz Output Output Voltage: DC 12V Total Output Current: 3A Total Outputs: 4ch Fuse Type: Physical Fuse Fuse Rating: 1.1A Ripple & Noise:<=120mv Efficiency:>=80% Storage Temperature:-40—85℃ Operating Temperature:-20—60℃ Net Weight: 0.92kg Cabinet Dimension: 162.5(W)x160(W)x50(D)mm Packing Dimension: 170(W)x170(W)x58(D)mm   General Protection: each output has individual physical fuse and LED indicator, when problem  occurs,  only affect the individual output, other outputs still working.   Circuit Short Protection: When short condition occurs, individual physical fuse will open the circuit, when condition removed,PTC fuse will automatically back to close.   High Voltage Protection: when high voltage occurs, the surge protection  will be hit through to protect the connected device. Over Current protection: when over current occurs, the power supply will automatically switch to self-protection status, when condition removed, then switch back to normal and don't  need to change the FTC fuse.