OTTOVAC is a portable electric vacuum lifting device intended to lift and move glassand any other material that has a smooth, flat and non-porous surface. Fully electric, works on 4-AA batteries; no manual pumping required Reliability and Safety: Built-in pressure sensor with automatic start/stop function Maximum lifting capacity 200 kg (440 lbs) Works on textured services Red/Green LED indicator light for battery life Dependability: No longer be frustrated with the manual cups losing pressure and losing suction to your material. OTTOVAC takes the guesswork out of it The OTTOVAC is a portable electric vacuum lifting device intended to lift and move glassand any other material that has a smooth, flat and non-porous surface. The OTTOVAChas a built-in pressure sensor with an automatic start/stop function. When the vacuumin the base of the suction cup reaches -55 kPa, the pump will automatically stop after athree-second delay. When the vacuum level drops below -55 kPa, the pump willautomatically restart, reaching the required pressure during operation.