If Broadlink switch changes state, then send IFTTTrigger action to your Alexa device
Then
sendAlexaActionByMkzense
This service from mkZense will send an action to run a routine on your Alexa device. Use it to add Voice to your Applet.
ID eH98K34v
Explore more great ways to automate Alexa Actions by mkZense and BroadLink