Seco-Larm SK-919T4-GNQ Pack of 2 Enforcer Pendant RF Transmitters; 4-Buttons, 15-Channels; Over 68 billion possible codes; Operates up to 500ft; Anti-scan protection; IP66 Weatherproof 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: - Compatible with all 315MHz SECO-LARM receivers - Over 68 billion possible codes - LED transmission indicator only appears when buttons are pressed - Operates up to 500ft (150m) (Operating range will vary greatly depending on the installation and operating environment) - RF Anti-scan protection - FCC and IC Certified - Weatherproof (IP66) Specifications: - Type: 4-Button RF Transmitter with 68 billion codes - RF Frequency: 315MHz - Buttons: 4 - Channels: 15 - IP Rating: Weatherproof IP66 - No. of Codes: 68 billion possible codes - Overall Dimensions: 1.24 x 2.16 x 0.31 inches