Penis Trainer == Penis Massager is a great endurance device. If you are close to ejaculation, you can change the type of stimulation and delay ejaculation. Urinary training increases the time of sexual intercourse, resulting in an overwhelming orgasm. USB Rechargeable == Charging is easy with the included usb cable, you can charge it anytime, anywhere. 100% waterproof male vibrator is made of waterproof silicone and is easier to clean with warm water and soap. Can be used in the bathtub, Tips: Please don't immerse the electronic products in water for a long time. Easy to clean and operate == The penis trainer is waterproof and can be easily used for showers, baths or swimming pools. We recommend using sterile soap for cleaning after each use. Colour : Black Material: Silicone Duration: about 1 hour Charging method: USB charger Frequency mode: 10 types Sound level: