Bosch GLM 50-27 C Laser Measure 0.05 - 50m, Bluetooth connectivity, 360° Inclination sensor from Lawson HIS
File:Bosch GLM 50 C.jpg - Wikipedia
Bosch Professional Laser Measure GLM 50-27 C (range: up to 50m, robust, IP65, data transfer via Bluetooth, 2x AA batteries, hand strap, pouch) : Amazon.co.uk: DIY & Tools
0601072C00 | Bosch GLM 50 C Laser Measure, 0.05 → 50m Range, ±1.5 mm Accuracy | RS Components
User manual Bosch GLM 50 C Professional (English - 566 pages)