... , DTM312B, DTM315A, DTM315B, DTM322A, DTM322B, DTM325A, DTM325B suits the measurement with target and prism.SPECIFICATION: ModelDTM312A,DTM312BDTM315A,DTM315BDTM322A,DTM322BDTM325A,DTM325BTelescope Length150mmMagnification30XImageErectShortest ... Display equipmentDouble sides 20-digit, 4-line dot matrix LCD panel with background illuminationHorizontal angle display range0°~359°59’59”Vertical angle ...