Bosch GLM 50-27 CG Professional and GLM 50-22 Professional rangefinders - according to engineers
The Bosch Professional GLM 50-27 CG and GLM 50-22 rangefinders are built for use in even the harshest conditions. The key difference between them is that the GLM 50-27 CG can be paired with the Bosch MeasureOn smartphone app via Bluetooth™, taking rangefinding to a whole new level.