The Stabila REC300 Receiver has two displays: one each on the front and back for fast measuring and taking readings in any position. Digital display of the reference deviation in mm, in, in (fractions) and ft. Allowing you to read the deviation from the reference height directly in figures, for faster and more precise correction of strut positions and concrete levels. A series of symbols indicate your distance from the reference height and whether you are too high or low. Two sensitivity levels simplify setting-up over longer or shorter distances. If you also switch on the acoustic signals, you can select two volume levels. Its loud signal can be heard even with a loud background noise. Compatible with: LAR200 & LAR250 lasers. REC300 Digital Receiver To Suit LAR200 & LAR250