The moment she turns it on, she is going to feel the difference. The Viper is designed to reach her from both sides at once, internal and external, with sculpted textures that grip and press in all the right places. When it hits exactly right, and it will, the fullness of that combined stimulation builds into something she is not going to want to stop. Watch her find her rhythm and stay there.Ten vibration modes give her real options, three speeds and seven patterns, so she is not locked into one sensation. She can start slow and climb, or skip straight to what she knows works. The body-safe UltraSilk silicone is genuinely soft against her skin, and the dual-ended design means both ends are doing something intentional. It charges via USB so there is no scrambling for batteries at the wrong moment, and it is fully waterproof, which makes the bathtub a completely different kind of evening.You picked something that was designed around her experience, not just its own novelty. The quality is there, the versatility is there, and the sensation she is going to get from this covers everything she needs. She is going to love it, and she is going to know you paid attention when you chose it.Overall Length: 5.5 inches (13.9 cm)Diameter: 1.5 inches (3.8 cm)Vibration Modes: 10 (3 speeds, 7 patterns)Material: UltraSilk body-safe siliconePower: USB rechargeableWaterproof: Yes