Daikin Service Diagnosis Tool app can provide multiple service tool functions for your daily service diagnosis job. With "Service Diagnosis Tool" connection device (SDT-02), you can carry out below checks by this app. - Type3 checker - Transmission monitor - Inverter analyzer - Actuator checker - RAM monitor (basic operation data display) To use this app, you need below devices to connect with Daikin's AC products. - Service Diagnosis Tool (SDT-02) - Wireless Adapter (BTSC/i2S)