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 Next Buying Options Duo 2 Add to Cart Vibe Add to Cart Liberty 2 Add to Cart OG Add to Cart Premium 2 Add to Cart Customer Reviews 3.7 out of 5 stars 766 3.4 out of 5 stars 41 3.3 out of 5 stars 37 3.3 out of 5 stars 3 3.7 out of 5 stars 231 2.2 out of 5 stars 19 3.8 out of 5 stars 805 Price $99.99$99.99 — $219.00$219.00 $129.00$129.00 $99.00$99.00 $129.00$129.00 $199.00$199.00 Womanizer Technology Pleasure Air 3D Pleasure Air Pleasure Air Ultrawave Vibration Pleasure Air Pleasure Air Pleasure Air Intensity Levels 12 14 14 10 8 12 14 Double Stimulation ✔ ✘ ✔ ✘ ✘ ✔ ✘ Vibration Modes 12 — 10 — — 3 — Travel Cover ✘ ✘ ✘ ✘ ✔ ✘ ✘ Smart Silence ✘ ✔ ✔ ✔ ✘ ✔ ✔ Afterglow ✘ ✔ ✔ ✘ ✘ ✔ ✘ Waterproof IPX7 IPX7 IPX7 IPX7 IPX7 IPX7 IPX7