Lascar sp 300 series 35 digit led panel meters lascar sp 300 blue this 35 digit panel meter has a blue led display that ensures excellent readability a negative rail generator enables the meter to measure signals referenced to their own power supply gnd the meter is suitable for both high and low volume applications and can be quickly and simply fitted with a design that provides splashproof protection lascar sp 300 blue 35 digit led voltmeter blue