The Sifam R32AF / MK4 meters are nice eye-catchers with a solid black metal bezel. The meter is calibrated for use with a 3.6k ohm resistor for reference 0 VU which is produced by a signal 4 VU above 1mW into 600 ohm 1.228V. The standard scale marking is ?20 to 0VU in black and 0 to + 3 VU in red and a dark background scale plate. Black angled indicator. Replacement Meter for FOCUSRITE ISA One und ISA 430 MkII.