Smaller size & wider application range—Suitable for most types of door lever handles available in the market. Its compact design offers broader compatibility compared to similar locks. Features a dedicated "LOCK" and "UNLOCK" mechanism. Locking requires two-handed operation (three buttons), while unlocking can be done with one hand using two fingers. Easy for adults to operate, yet difficult for young children. Simple, discreet design that complements room decor. Easy installation—Apply directly to the door surface using the included 3M VHB adhesive tape. No drilling or tools required. The 3M VHB tape provides strong adhesion (optimal bond achieved after 24 hours) and can be removed cleanly without residue or damage to the door. Ideal for preventing children or pets from locking themselves in rooms. Helps restrict access to specific areas such as bathrooms or storage rooms without adult supervision. Reduces risk of finger pinching from door play. WARNING & ATTENTION: Always ensure the safety lock is in the "UNLOCK" position when children are unattended. Before use, verify that the door handle cannot be lifted or pushed to open the door while the lock is engaged. This device is not suitable for doors that can be opened by lifting the handle.