This gmc-500 plus product is newly designed and developed by GQ electronics LLC, seattle USA year 2017 GMC-500-RPS the features highlight: it can be used by main unit or use with computer dual detection sensors high detection range portable size: 5 inch x 3 inch x1 inch weight: 8 oz. Lcd display with backlit: contrast brightness power saving mode selection real time measure radiation and visualize on the LCD screen data logging feature and upload data to website via Wi-Fi connection read time record data and process data later on PC gyroscope for display adjust with the position multi-language support auto display and alert while the detection level is high rechargeable battery included. Charge options: USB charge, car charge and wall charge package includes: one gmc-500 main unit one rechargeable battery one USB cable (for charge and data communication) one quick start guide print-out one standard data viewer software (free) this gmc-500 product is newly designed and developed by GQ electronics LLC, seattle USA year 2017 GMC-500-RPS the features highlight: it can be used by main unit or use with computer dual detection sensors high detection range portable size: 5 inch x 3 inch x1 inch weight: 8 oz. Lcd display with backlit: contrast brightness power saving mode selection real time measure radiation and visualize on the LCD screen data logging feature and upload data to website via Wi-Fi connection read time record data and process data later on PC gyroscope for display adjust with the position multi-language support auto display and alert while the detection level is high rechargeable battery included. Charge options: USB charge, car charge and wall charge package includes: one gmc-500 main unit one rechargeable battery one USB cable (for charge and data communication) one quick start guide print-out one standard data viewer software (free).