Both the main unit and the sub unit have the following functions: measuring temperature *memory min/max temperature value.
* high temperature alarm (temperature will exceed the preset value will give an audible alarm).
* low temperature alarm (temperature will be lower than the preset value will give an audible alarm).
Indoor temperature range: 0 C~+60 C.
The outdoor temperature range: - 40 ° C ~ + 60 ° C.
Temperature accuracy: +/-1.0.
Power (host) : 2*7 battery.（not incl battery）
Power (submachine) : 2*5 battery. （not incl battery）
Weight: 1. 1 gross weight 180g, net weight 138g, 220g, net weight 178g.
Wireless range: no interference 100 meters.
