Feature: 1. SENSITIVE: The automatic door opener remote control is small and portable, easy to use, sensitive control and convenient. 2. PORTABLE: A set of 2 automatic door remote control, with a key clip, can be hung on a bag or belt, easy to carry and store. 3. LONG DISTANCE REMOTE CONTROL: The remote control distance of this electric automatic gate remote is up to 40m. 4. MULTIPURPOSE: Remote control automatic doors, automatic door equipment such as chicken coop doors, warehouse doors, underground garage doors, etc. 5. PREMIUM MATERIALS: Door remote control is made of ABS and zinc alloy material, which is safe, and high durability. Specification: Item Type: Remote Controls Material: ABS, Zinc Alloy Chip: HCS301 Rolling Code Frequency: 433.92MHz Effective Distance: Approx. 40m/131.2ft Number and Type of Batteries: New Type: 1 x 27A Dry Battery (Not Included); Old Type: 1 x CR2032 Button Cell (Not Included) (New and Old Type Random Delivery) Purpose: Remote Control for Automatic Door Opener. Package List: 2 x Remote Controls1 x Manuals