12v Socket with Digital Battery Volt & Amp Meter with Double Black Face Plate12v SocketA compact, neat solution to allow a variety of 12v appliances to run from your leisure battery.The 12v socket comes with a threaded stem and nut so its easy to fit into your campervan side furniture or straight into the panelling of your van/motorhome, regardless of the material thickness.Approx Dimensions: Face plate L10.5cm x H4.5cm Socket W4cmVolt & Amp MeterThese compact unit differs from most in that it measures both voltage and current (amps). The voltage measures the health of your leisure battery. Whereas the current reading (amps) measures the flow of power along your cable to your appliances. If you want to work out how much power in watts is being drawn by your appliance, then you can use the equation:W (watts) = V (volts) x A (Amps). For example, if the Ammeter is reading 4 amps then the power consumption would be 12 Volts x 4 amps 48 watts.This unit can also be used to gauge how much power in amps is being pushed into your battery by your solar panel, this is very useful to know as it will give you an idea on how fast your leisure batteries are being charged.Operating voltage DC 12v-24vMeasurable voltage DC 6-28vMeasurable current 0-10 ampsMaximum input Dc 20amps