The ML-X3 is a smart deadbolt that is another great addition to the McGrath Locks product range. The ML-X3 uses 4pcs AA (Duracell Only) batteries, it can last up to 12 months on standard use with 10 openings a day. The ML-X3 has a simple installation process as it can fit in place of a 54mm hole or retro fit into an existing keyed deadbolt, the flexibility of the ML-X3 is that it is supplied with an adjustable 60mm to 70mm deadbolt. The ML-X3 can work on door widths from 35mm to 50mm. It also works with the TT lock APP that provides the ability to manage all E-keys, pin codes, RFID cards/fobs and fingerprints. An audit trail is provided in the TTlock APP records. You can also grant and control access to family, friends, client, or tradesmen. It allows you to grant access for weeks, days or hours, and modify or remove access as needed, all at your discretion. It can also be Wi-Fi enabled which allows remote access via the G2 gateway.