BO is a gentleman's ring whose place in history is assured - the first stylish and rechargeable male pleasure object of his kind, BO has already gone where others can only follow. His unique design promises comfort to men of all sizes, while stimulation is delivered through an energetic and vigorous vibe. Still more flexibility is offered depending on how he is worn, with the wearer becoming noticeably more endowed, while prolonging the sensations for individuals and couples alike. BO is the perfect gift for those who wish to make a great experience even better, and as you would expect, this potential for pleasure only gets stronger with time. Colours: deep blue / bordeaux red Materials: ABS / body safe TPE Finish: soft silky Size: 56 x 45 x 20 mm Weight: 25 grams Diameter: 29 mm Battery: Li-lon 130 mAh 3.7 V Charging: 1 h at 4.8v 200 mA User time: up to 4 hours Standby: up to 90 days Frequency: 150 Hz Max noise level: <50db Interface: on - off