The Pushbullet - Send message Task allows you to send a message to any contact and/or your own device and/or channel.
Connection
Select an existing global Pushbullet Connection for storing connection credentials.
Title
The notification title.
Body
The message of the notification.
Pushbullet - Send Message > Recipients > Devices sub tab
With Pushbullet you can send to a Contact, Device or a Channel. If you have selected a Connection these will refresh and you will be able to select on or more recipients.