Sonoff TH10/16 WiFi Relays Support Temperature and Humidity Probes

Sonoff are dirt cheap WiFi AC/DC relay systems based on ESP8266 selling for about $5 with board and case. They are made by ITEAD Studio, and the company

Sonoff TH10 & TH16: Sensors, Displays, Actuators, - Tinkerman

Sonoff TH16 WiFi - relay that monitors Botland - Robotic Shop

SONOFF TH Origin 16A/20A Smart Switch Temperature and Humidity Monitoring Sensor

SONOFF TH Origin Smart Temp and Humidity Monitoring Switch – AHS

WiFi Smart Switch with temperature and humidity monitoring (Sonoff TH10)

Sonoff TH10 WiFi Smart Temperature and Humidity Monitoring Control Switch Work With Alexa,Google Home,Nest – Sonoff India

SONOFF - TH10/TH16 compatible temperature and humidity sensor

Sonoff TH10/16 WiFi Relays Support Temperature and Humidity Probes - CNX Software

Wifi remote Sonoff TH16 - Temperature And Humidity Monitoring Smart Switch

SONOFF THR316 Origin Smart Temperature and Humidity Monitoring Switch (TH10/ 16 Upgrade Version)

Cheap TH-16 Smart Wifi Switch Compatible with Sonoff & EWeLink 16A/3500W Monitoring Temperature Wireless

Sonoff TH16 - temperature and humidity monitoring switch - Kamami on-line store

SONOFF TH Origin Smart Temperature and Humidity Monitoring Switch (TH10/16 Upgrade Version) – C.B.Electronics

Sonoff TH Origin Smart Temp and Humidity Switch (16A or 20A - sensors optional) - ISP Home

Sonoff TH Origin Smart Temp and Humidity Switch (16A or 20A - sensors optional) - ISP Home