... 1, SUPER SILENT. low working noise, can be used for all medical equipments, which need quiet air supply.2, ... or voltage, the motor would cut off automatically to ensure equipment and personal safety.7, EASY OPERATION. quite simple operation ... DONE ANTI-RUST TREATMENT, make sure pure outlet air flow for medical equipment. Model: Oilless Air Compressor GSP811AVoltage220v/ 110VRate545 WFrequency50Hz / ...