... 3. Temperature: -10~60 4. Certificate: CE, RHOS, CCC Power meter, energy meter, multifunctional mini-ammeter Functions: 1. Measure real-time voltage of the ... . Calculate the cost of energy according to the pre-set price of energy (0~$9999); price of energy can be pre-set to ... 120pcs/ctn for EU version140pcs/ctn for other versions Power meter, energy meter, multifunctional mini-ammeter