Pretty Love Bertram is an awesome vibrating ring made with high quality silicone and it incorporates a powerful bullet very easy to use. 

• 100% high quality medical silicone
• VIbrating bullet made with ABS. It works with 2 batteries LR1130. (You can find them in Batteries section)
• Easy to use. Just press the button. 
• It will Increase your erections and delay the ejaculation

Pretty Love manufactures products with high quality standards and designed in EEUU. 1 year warranty on technical defects.