SECURE DURABLE STYLISH FLEXIBLE PERFECT SIZE IU-30 is the second generation keypad door knob lock from iulock. It has perfect size with a removable silicone gripper,more snug on handle. It can be adapted to more doors and can completely replace traditional mechanical doorknobs, mechanical door handle locks and door lever locks. Auto-Lock for peace of mind, so you are never forgetting to lock the door, auto-lock after 4 seconds of being opened, aut-lock timer can also be programmed by yourself. High weather resistance Special waterproof technology is used inside the knob, which can work well in the sunny or rainy environment. Low power consumption, no need to change batteries frequently,4 AAA alkaline batteries can usually be used for more than 18 months,and the low battery alarm is 2 months in advance. With wide temperature design, each part can run under wide temperature, and through strict wide temperature test to ensure that each lock runs smoothly from -22F to 176F. This keypad door knob offers passcode or key to access. 1 master code and 50 user codes.Access codes can be 1 - 15 digit in length. Enable silent mode when you don't want to be disturbed by the beeping. Passcode protect supports you enter random digits before or after the correct access code. Two passage modes are available. Easy passage mode for easy back to auto-lock. Advanced passage for a long time no need to auto-lock. What's in the package 1 * IU-30 Electronic Door Knob lock 2 * Keys (Compatible with KW1) 1 * User Manual 1 * Screw Set 1 * Strike Plastic Box 1 * Strike Plate 2 * Rosette Rubber Seal 2 * Knob Rubber Grip (Assembled on the knob) When installed on metal doors,using the rosette rubber seal will protect your door against from rain and dust. Door thickness: from 1-3/8" to 2-1/2"Backset: 2-3/8" or 2-3/4"Rosette diameter: 3-1/8"Knob length: 2-3/4" (single side) When installed on wooden doors, 2 small studs of the rosette allow the lock to be installed more firmly. IMPORTANT NOTE INSTALLATION This lock is easy to install, please refer to the installation user manual first. The warning section in the manual requires special attention. MASTER CODE The master code MUST EXIST and can be modified, but cannot be deleted. Therefore, you must modify the matser code when you start using it. Features Access: code or key (1 Master Code, 50 User codes, 2 Keys) Length of Passcode: 1-15 digits Power supply: 4 * AAA batteries (Not included) Battery life : 18 Months Backup supply: USB type-c (Cable Not included) Auto-lock timer: Default 4 seconds (Variable from 2 seconds to 12 hours) IU-30 Matte Black 2 x IU-30 Matte Black IU-30 Golden 4 x IU-30 Matte Black 3 x IU-20 Matte Black 8 x IU-30 Matte Black Add to Cart Add to Cart Add to Cart Buying Options Add to Cart Add to Cart Customer Reviews 4.4 out of 5 stars 1,568 4.4 out of 5 stars 1,568 4.4 out of 5 stars 1,568 4.4 out of 5 stars 1,568 4.3 out of 5 stars 1,136 4.4 out of 5 stars 1,568 Price $39.99$39.99 $89.98$89.98 $52.99$52.99 $159.99$159.99 $135.99$135.99 $319.99$319.99 Code or Key ✓ ✓ ✓ ✓ ✓ ✓ Waterproof IP65 IP65 IP65 IP65 IP65 IP65 Code length 1-15 digits 1-15 digits 1-15 digits 1-15 digits 4-15 digits 1-15 digits Knob length 2-3/4" 2-3/4" 2-3/4" 2-3/4" 3-1/8" 2-3/4" Weight 2.3Lb 2.3Lb 2.3Lb 2.3Lb 2.7Lb 2.3Lb Latch 2-3/8" or 2-3/4" 2-3/8" or 2-3/4" 2-3/8" or 2-3/4" 2-3/8" or 2-3/4" 2-3/8" or 2-3/4" 2-3/8" or 2-3/4" Rubber Grip ✓ ✓ ✓ ✓ - no data ✓ Rosette Rubber Seal ✓ ✓ ✓ ✓ - no data ✓ Power supply 4 * AAA batteries 4 * AAA batteries 4 * AAA batteries 4 * AAA batteries 4 * AA batteries 4 * AAA batteries Backup supply USB Type-C USB Type-C USB Type-C USB Type-C USB Type-C USB Type-C