World Wide Input Voltage 100-240VAC 50/60Hz. OVP, OCP, SCP Protection (OVP: Over Voltage output Protection. OCP: Over Current output Protection. SCP: Short Circuit output Protection). Tested Units. In Great Working Condition. New AC/DC Adapter Compatible with CHIROGUN Model 7MG 12V 2500mAh 30Wh 12 Volt 2500 mAh DC12V Lithum-ion Li-ion liion Battery Deep Tissue Percussion Muscle Massage Gun WTK-BAT-05-25 YEL-CGM0028HZ8FU9 X002ZNCII3 X002I5M5RH +12V 12.0V 12 Volts 12VDC 12 V 12 VDC Power Supply Cord Cable PS Wall Home Battery Charger Mains PSU !!!Tips: Rechargeable batteries don't last forever, the average battery last 1 to 3 years. If the battery is old/dead, it will not accept a charge. But not charger's problem. If you're not sure whether battery or charger is dead or not. You must have a volt meter in order to tell whether or not a charger is working. New AC/DC Adapter Compatible with CHIROGUN Model ALPHA X 7MG 12V 2500mAh 30Wh 12 Volt 2500 mAh DC12V Lithum-ion Li-ion liion Battery Deep Tissue Percussion Muscle Massage Gun WTK-BAT-05-25 YEL-CGM0028HZ8FU9 X002ZNCII3 X002I5M5RH +12V 12.0V 12 Volts 12VDC 12 V 12 VDC Power Supply Cord Cable PS Wall Home Battery Charger Mains PSU CECCCROHS 100-240