Do I need to buy batteries? InsideOut is rechargeable so you won't need to buy batteries, simply charge via the included magnetic USB cable for up to 2 hours of play on one full 120-minute charge. What kind of lubricant can I use with my Womanizer? Water-based lubricants are the best option for Womanizer products. The stimulator head is made from a high quality silicone that can be deteriorated by silicone lubricants. ​ Can I use my Womanizer in the shower? You can use all WOMANIZERs with waterproof icon in the bath or shower as they are IPX7 waterproof. ​ What are the product specs? InsideOut is 20cm x 9cm x 6cm, weighs 240g and is made from body-safe silicone. It has a run time of 120 mins and a charge time of 120 mins, and is IPX7 waterproof. How InsideOut Compares InsideOut Add to Cart Enhance Add to Cart Next Add to Cart Duo 2 Add to Cart Vibe Add to Cart OG Add to Cart Premium 2 Add to Cart Customer Reviews 3.7 out of 5 stars 770 4.7 out of 5 stars 17 3.4 out of 5 stars 41 3.3 out of 5 stars 37 2.9 out of 5 stars 4 2.2 out of 5 stars 19 3.8 out of 5 stars 808 Price $99.00$99.00 $159.00$159.00 $219.00$219.00 $219.00$219.00 $129.00$129.00 $129.00$129.00 $199.00$199.00 Womanizer Technology Pleasure Air Pleasure Air and Vibrations 3D Pleasure Air Pleasure Air Ultrawave Vibration Pleasure Air Pleasure Air Intensity Levels 12 10 Pleasure Air, 10 Vibrations 14 14 10 12 14 Double Stimulation ✔ ✘ ✘ ✔ ✘ ✔ ✘ Vibration Modes 12 10 — 10 — 3 — Travel Cover ✘ ✘ ✘ ✘ ✘ ✘ ✘ Smart Silence ✘ ✘ ✔ ✔ ✔ ✔ ✔ Afterglow ✘ ✘ ✔ ✔ ✘ ✔ ✘ Waterproof IPX7 IPX7 IPX7 IPX7 IPX7 IPX7 IPX7