UpBright [UL Listed] New AC / DC Adapter For Grandstream HandyTone HT502 HT503 Telephone, Honor Electronic Co., LTD. Model: ADS-7.5Z-12 12006GPCU 12V 0.5A-0.75A w/ OD: 5.5mm x ID: 2.1mm / 2.5mm Tip 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. UpBright 30 days money back guarantee. 1 full year service warranty. UpBright [UL Listed] New Global AC / DC Adapter For Grandstream HandyTone HT502 HT503 HT 502 HT 503 ATA Analog Telephone Adapter VOIP Router, Honor Electronic Co., LTD. Model: ADS-7.5Z-12 12006GPCU 12V 0.5A-0.75A with OD: 5.5mm x ID: 2.1mm / 2.5mm Tip 12VDC 12 Volts 500mA-750mA 0.5 Amps-0.75 Amps Power Supply Cord Cable PS Battery Charger Mains PSU