The switch-mode charger is the highest quality of electronics. It has full compliance with CE and LVD standards, and a special circuit protects against overheating and voltage spikes. Blue Star AC Charger: - Model TFK-TC-1100B - Input Voltage: 110-240V~ - AC Input Frequency: 50-60Hz, 0.3A - Output Voltage: 5.0V , 1A - Output Power; 3W - Average Operating Efficiency: > 69.6% - Low Load Efficiency (10%): > 59.6% - No-Load Power Consumption: < 0.1W - Cable Length: 1.13m - Color: Black Dimensions: A: 8cm B: 10cm C: 3cm D: 13cm