Doulos, a Greek word meaning slave, but there sure is no downside to being a slave to Doulos.
 
Made from soft medical grade silicon, this Bluetooth compatible men’s penis vibrator and masturbator will train for the delay of ejaculation. Doulos can be used manually with its nine vibration frequencies or you can install the App and control the vibrator using your mobile phone. The App allows you to control and change frequencies by a music melody, shake mode or interactive mode, where you can add friends to control each others vibrators and make video calls.
 
Features:
USB charging (fully charged in 2-3 hours) for 1.5 to 2 hrs of Doulos time
Medical grade silicon
Fully waterproof.