1) Especially design for EEPROM software write in indoor and outdoor PCB of Inverter Air - conditioner. 2) To guide Hitachi service technician for inverter air conditioner troubleshooting. 3) OTA update for BLE Software Update. 4) It is available in 7 regional languages like English, Gujarati, Hindi, Bengali, Tamil, Telugu, Malayalam, Kannada. This application is for Hitachi internal use only