Double Ring Lock and Tongue Locking: Different from ordinary lock ring, sohimi's double-ring lock can better prolong your erection time. The tongue locking allows your partner to enjoy the pleasure of teasing the clitoris, and also can stimulate your testis. Perfect Size: The diameter of the lock ring is about 1.3 feet, suitable for most people. Very small and easy to carry. It is the best choice for beginners. Battery Design: No need to charge, just put in the battery to work. After inserting the battery, the jump egg at the position of tongue locking will start to work. Bring you the ultimate happiness. 100% Waterproof: IPX 7 waterproof level, can be used in the bath, swimming pool and wet places. Also easy to clean. Discreet Package: Sohimi committed to protecting customers' privacy. Personal information will not be shown on the package. If you have any questions, feel free to contact us.