[Robust and secure] Our key safe with a number code consists of high -strength zinclegation and solid steel, against hammering, sawing or lifting. [4 access methods] 1 fingerprint (fast and high-precision identification even with wet fingers);2-10-digit passwords (offers over 100 billion password combinations);3-2 IC cards contain (for easy unlocking the key box with a number code);4 -over app [Waterproof and ] Made of stainless SPCC metal material to against rain, snow, block or freeze, this key safe on the outside works well at a temperature of -20 ° C to 70 ° C [Bluetooth with application] This key safe outside contains the universal Tuya Smart app, with which owners can grant other access to others by generating a temporary code [Large capacity] The inner dimensions: 11x6.6x5cm (HXBXT) enables the placing of bank cards, keys, car breaks, etc. Note: without 3AAA battery Colour:black Material:Zinc alloy Size:11 x 6.6 x 5 cm TT-Lock version Package Contents: 2 x key safe 4 x IC cards 6 x screws 2 x English instruction manual Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.