3-Series Security Keypad in few words:
CentraLite 3-Series Security Keypad 3400 is a cost-effective and user-friendly keypad for controlling ZigBee HA 1.2 enabled security. It is packed with awesome features like backlit keys, LED lights and arming buttons. It has two CR-123a batteries which have a really good battery life of about 3 years. It can be mounted easily on a wall too by using either screw or adhesive. When you search for it in the dark you can find it easily as the keypad lights up when it senses the user. It is compatible with all ZigBee HA 1.2 certified devices.
Some of the features of this keypad are
Has LED status indicators
Has arming and disarming features
You can mount it using screws and also by adhesives
Has proximity sensor to detect users
Receives over the air update
You get to hear sound when you touch the buttons while arming and even alerts
The volume of these sounds can be adjusted
3.13" x 4.5" x 1.0"
CR-123a batteries, with battery life up to 3 years
-20 to 50 °C
Thus it a cheap and best option for controlling your home security system.