... ,outside slot 3.suitable for building intercom syst Single cylinder V3302I electric silent lockMedel item: V3302ILock body size: 126*105 ... times1.suitable for intelligent building intercom system2.Operated by electric control,key or hand,steady operation,automatic resetFeature:1 ... adopt newest patent technology,having incomparable advantages from tradition electric locks.2.Low noise and no shock when ...