The SDM120D (No Backlight) is a basic kWh meter with a fixed pulsed output. This is a low-cost solution for measuring low load circuits (45A rated). All SDM120 meters are housed in a 1U Din rail mounted housing. They also come complete with sealable terminal covers to stop any tampering with the connections. Displayed Parameters: Active energy (kWh) Certifications and Standards: MID: EN50470-1 & EN50470-3 Class B EMC: EN61326-1 & EN61326-2-3 LVD: EN61010-1 & EN61010-2-3.