Silicone triple-motor massager with 5 functions of vibration, pulsation and escalation plus independent incremental speed control. Power Boost Button for instant maximum vibration and rotation. Satin Finish and virtually seamless silicone, unscented, non-porous, hypoallergenic. Whisper quiet and waterproof. Rechargeable Lithium Ion battery runs for 45 minutes on high speed, 1.5 hours on low speed. Complete USB charge in 2.5 hours. Shaft measures 5 in. by 2.5 in.