: This digital ringlet is the consummate ringlet for residential or commercialized units that need access for double people. : It has 3 unlock options : M1 card, Pass code or automatic Key. This link does n't removed activity, if you need it come with removed activity, please buy from ASIN B01IVJLAVY Max of 100 Codes, 800 Cards users. Keypad illumination Pass word funtion, you can input many digits before and after your code to unprotected the door, for example, your code is 666666, you can input 12352 +666666 +98658 to unprotected the door, overall length must be less than 20 digits Passage mode acquirable when enter into this mode, the ringlet wo n't automatically ringlet after unprotected once, no need to input code every time for a drudging door Handle Orientation for this ringlet is easily reversible standardized one-man Latch, backset reverisible for 2-3/8 '' -LRB- 60 mm -RRB- and 2-3/4 '' -LRB- 70 mm -RRB- ; In case of assassinated battery The ringlet will alarm when the battery voltage is lower than 4.8 V, You can use keys to unprotected the door in case of assassinated battery, you need to move away the of import hole cover introductory. there is a integrative sucking to do this or you can use a magnet to move the of import hole cover away Video Guide acquirable Problem shot steps : 1. Ca n't code : please reset the ringlet by press the reset button for 5 seconds -LRB- the reset button in under the battery cover -RRB-, then program it again. . . to work within a short-dated time : reset the ringlet introductory and reprogram it, if still fails to work, please contact seller for a replacement .