Catalog > Internet of Things (IOT) Related Products > Itead Studio 2.5mm Audio Jack to RJ9 Adapter 2.5mm Audio Jack RJ9 Adapter SONOFF AL010 JACK TO RJ9 ADAPTER ** Discontinued ** THE SONOFF AL010 2.5MM AUDIO JACK TO RJ9 4P4C ADAPTER IS USED TO CONNECT AM2301/SI7021 TEMP AND HUM SENSOR, DS18B20 TEMP SENSOR AND MS01 SOIL MOISTURE SENSOR (WHICH HAVE A 2.5MM AUDIO PLUG) TO THE NEW THR RANGE OF SMART SWITCHES (WHICH Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Features Adapter– 2.5mm Audio Jack to RJ9 Adapter. Works with– AM2301/Si7021 temperature and humidity sensor, and DS18B20 waterproof temp sensor, MS01 Soil Moisture Sensor.