 | If one switch controls one light, it is a single-pole switch. |
 | If two switches control the same light, they are both 3-Way switches. |
 | If three switches control the same light, one of them is a 4-Way switch. The other two are 3-Way switches. |
Identifying your existing switches
The Wemo® WiFi Smart 3-Way Light Switch, WLS0403 can replace your existing 3-Way and single-pole light switches. To help you identify your existing switches, refer to the illustrations below:
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