Nest Massager is specially designed for men, and ultrasonic massage reaches deep into muscles. Wrap and massage testicles in all directions, and spare every sensitive nerve, make penis get harder stronger and more durable.wrapping testicles can stimulate the testicles and vulva at the same time,double layer penis ring firm not easy to fall and slide to gently limit blood flow-increase your pleasure time. It can be used covertly no matter when and where,the remote control distance of 11m is more suitable for partners to flirt, no affected by time and environment,9 vibration modes bring different orgasm experiences.