Digicode DC5070 300 Mhz 2 Button Keychain Remote Features Multicode compatible 2 button remote control transmitter. Remote has 2 sets of 10 dip switches, one for each door or gate, allowing for 2 sets of 1024 possible code combinations. Designed to be fully compatible with all of the Digi-Code receivers as well as existing Linear 300Mhz receivers, simply set the dip switches to match your receivers. Includes heavy duty Eveready 9 Volt battery and built-in LED light to indicate battery strength. Dimensions are 2 5/8"" x 1 3/4"" x 1/2"" Full manufacturer warranty, Made in the USA Coding instructions included