Answer: Please use it with one zigbee gateway . It cannot work directly without zigbee gateway.
*How is the temperature and humidity display on app ?
Answer :If using Tuya Zigbee gateway, the temperature and humidity units of the app are accurate to 1 ° C without a decimal point. If using for Zigbee2mqtt platform,or for Yandex Alice Gateway /for Alexa Echo Gateway /for Ewelink Zigbee 3.0 Gateway etc., the temperature and humidity units of the app can be accurate to 0.1 ° C or 0.1%.Please understand.
*Is it compatible with Zigbee2mqtt on home assistant?
Answer: Yes,you can add device on zigbee2mqtt via related gateway.
*Can it work with alexa or google home voice control ?
Answer : If you link device to alexa via tuya app or smart life app ,tuya app may not have entrance.Suggest you can pair alexa built-in zigbee 3.0 gateway ,or google home assistant built-in zigbee 3.0 gateway,then can use it .
Product name : Temperature humidity sensor
Wireless protocol : zigbee
Working volatage : DC 3V
Battery type : LRO3-1.5V/AAA*2 (Not included battery)