Seco-Larm SK-919T1-GBQ Pack of 2 Enforcer 315MHz Pendant RF Transmitter, 1 Button and 1 Channel, Compatible with all 315MHz SECO-LARM Receivers, Operates Up to 500ft, Over 68 Billion Possible Codes Make access control, security, home automation, gate operation, or any type of product wireless with RF transmitters and receivers from SECO-LARM. Regardless of project, SECO-LARM RF equipment is a profitable, easy-to-install add-on for any application. Key Features - Over 68 billion possible codes - LED transmission indicator only appears when buttons are pressed - Operates up to 500ft (150m) - RF Anti-scan protection - FCC and IC Certified - Weatherproof (IP66) - Compatible with all 315MHz SECO-LARM receivers Specifications - Type: 1-Button RF Transmitter with 68 billion codes - RF Frequency: 315MHz - No. of Buttons: 1 - Channels: 1 - IP Rating: Weatherproof IP66 - No. of Codes: 68 Billion possible codes - Overall Dimensions: 1.24 x 2.16 x 0.31 inches