... 1.OEM 2,High quality,reasonable price,hot sale panel meter and ammeter,electronic instrument,ampere meter The scope of ... AC,DC,Voltage,power synchronous volume,frequency,expended voltage and overload current etc.The product performance is accordance with ... ,acceleration pounding frequeney of 80 to 120times per minute,and two hours tansport jolt;Operating positon:vertical directionFrequency:50Hz, ...