More compact casing, OKW, “Smart” series.
Front-end mounted electrode, made of Zepter stainless steel.
The device is built on one EPLD.
Power supply: 2 galvanic cells or rechargeable batteries, size AAÀ.
series continued in this device, in the same casing. From the 603 it inherited the casing, and all the rest was taken from the 713.
Unusual electrodes: two types of coaxial electrodes — small electrode at the front end of the device and bigger electrode on the underside.
Power supply: the same as in the 603.