The 220 V/50 Hz power supply is designed to charge the power supply of models 612 (PRO), 901PRO and 911PRO
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Power supply 220V 50Hz/12V. 100mA is included in the VM-612PRO, VM-911PRO, VM-901PRO package and is used to charge the 9V battery without removing it from the device body. It is offered as an option for other models.