Ambient Weather WH2F Wireless Thermo-Hygrometer for The WS-1171B and WS-1173B Wireless Weather Stations Ambient Weather WH2F Replacement Thermo-Hygrometer. Compatible with the Ambient Weather WS-1171B and WS-1173B Wireless Weather Stations. The WH2F model is NOT compatible with the WS-1170, WS-1171, WS-1171A, WS-1172, WS-1173, WS-1173A, WS-0100 and WS-0101 weather stations. Order the WH2C instead.