?EXCELLENT AFTER-SALES SERVICE? Your satisfaction is always our top priority,if you’re not 100% satisfied, please do not hesitate to contact us.Hope it can help make your home a safer place for your babies!. ? WATERPROOF & WIDE APPLICATION? PC&ABS material makes it stronger and bring longer service life.Waterproof material and the tape let you no worry of the rainy day. ? NO BABY FALLING? Help to fix the window and meet the request of ventilation. It is much smaller than the distance which babies will fall out of the window.The window lock can withstand 27kg of thrust, and 30kg of tension,no worry baby will open the window and fall.And also there's no worry of the shut of the window by strong wind.It won't damage the window or scare babies. ? AGEING RESISTANCE? Install the window restrictor with 3M VHB Adhesive, no drill and tools need. 3M VHB adhesive with strong viscous (Effect will be better after 72 hours.) and can be removed easily without any residual, no harm to the window.Strong 3M VHB tape resistance temperature of -30? to 90?,no worry of the hot summer and the cold winter. ? SPECIAL DETACHABLE DESIGN? Compare to the window restrictor in the market, This window restrictor have no key,so there no worry the key will lost and can't open the window.Special detachable design makes it easier to change the position of oping the window to fix the window with small distance.