The products are applicable for Watt-hour meters or energy meters. Specifications: 1) Work voltage: 2.5v - 6.0Vv 2) DC impedance: 450w ± 50w/ 23oC 3) Applicable pulse width: no less than 50ms 4) Applicable frequency: no more than 6Hz 5) Output torque: no less than uNm/5v 6) Work temperature: -35 ~ +70oC 7) Life: more than ten years (pulse exceeding one hundred million times) 8) Antimagnetic capability: according to IEC61036 standard 9) Other technical conditions: according to JB5459-91 standard 10) Applicable meter constant: 800 / 1,600 / 3,200 / 6,400imp/kW per hour 11) Speed ratio: 80:1, 100:1, 200:1, 400:1, 800:1 12) We can manufacture according to clients' specifications Inner packing: 4 ply box Dimensions: 43 x 40 x 5cm Outer packing: Carton dimensions: 45 x 41.5 x 22cm