HRF-M5-RWHRF-M5HRF-M52HRF-M53HRF-M6HRF-M8HRF-M82HRF-M83HRF-M85HRF-MX1-FHRF-MX1-2PFHRF-MX1-3PFHRF-MX1-4PFHRF-MX1-5PFHRF-MX1-6PFHRF-HD5FHRF-HD5F-RWHRF-HD5F-WBHRF-HD5NXHRF-M8-UHRF-M82-UHRF-M83-UHRF-M1-UHRF-M1-2PUHRF-M1-3PU防水、防油、防尘IP68，符合IEC/EN60529。其他国外、国内制造商的USB脚踏开关采用的是普通微动开关和敞开的控制电路，故障往往首先表现在微动开关部位，另敞开***的控制电路因粉尘污染、受潮、进水等原因造成损坏，降低可靠性和寿命。)