... with Two flat Pins, Over-voltage, Over-current and Short-circuit Protections 4.5V 500mA USA/Canada plug phone ... with Two flat Pins, Over-voltage, Over-current and Short-circuit Protections Key Specifications/Special Features:Features: Super small size ... : automatic recoveryOver-voltage protection: 120%Short-circuit protection: the adapter shall not damage by short DC output to groundLoad regulation: ...