Silicone probe. USB Rechargeable. 5 Functions of vibration pulsation and escalation plus independent incremental speed controls. Rechargeable Lithium Ion battery. Complete charge in 2.5 hours Unscented non-porous hypoallergenic. Virtually seamless Satin Finish Silicone Auto on/off button with LED indicator light. Security travel lock function. Whisper quiet. 100 percent waterproof. Easy to clean. Universal USB cord included.