Voltcraft green line digital multimeters voltcraft vc290 p the voltcraft green line vc 290 digital multimeter provides entry level class in professional measuring technology for all applications up to 600v br br well designed with a number of outstanding features the integrated high cap capacitor enables a batteryless operation and can be recharged optionally via the solar cell or via the 230v mains voltage making this device ideal for people who use it often as well as occasional user