Model: GL3 Brand: Newangel Technology: Oxygen jet+ oxygen spray+bio-photon electric Oxygen purity: 98% Maximum Power: 135W Ambient temperature: 5°C~+40°C Body materials: PVC plastic and Metal Frequency 1: 2.2khz ( deep skin layer) Frequency 2: 4.5Khz (middle skin layer) Frequency 3: 6.0 Khz (surface layer) Vacuum: 100KPA Voltage: AC110V/220V 50-60Hz