This bullet can be triggered by hand or by being attached to your mobile phone. Each time you receive a text message it will vibrate for 20 seconds, and each time you receive a phonecall, it will vibrate for the duration of the call and for twenty seconds afterwards or when you push the cancel button.
If you don’t want to wait for that phonecall or text, push the manual button and give yourself some thrills with the 10 vibrating patterns.