It is high input impedance (10GΩ), and high resolution (Max: 0.0001KV) for display. These features are very good for sales promotion.
HVC-803 has improved HVC-802 fix ranges. It is able to increase 100 times resolution to 0.1V when measure at the low voltage (1KV).
It shipped with a no attenuation and high isolation 40 KV professional test leader (BP-83). It is a very useful application for all Electronics and Engineer Company, School and R+D Institution.