Seco-Larm SK-919T1-GBWQ Enforcer Pack of 2 Wired Single-Channel RF Transmitters; Operates up to 500ft; LED Transmission Indicator; 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: - Frequency 315MHz - Operates up to 500ft (150m) - Over 68 billion (6.8x1010) possible codes - LED transmission indicator - Compact size - Compatible with all SECO-LARM SK-series receivers of the same frequency Specifications: - Type: 1-Channel Wired RF Transmitter - Wiring - Switch: Two 6" wires for N.O - Wiring - Power: Two 6" wires for power input - Power - External: 3 to 13 VDC output regulated adapter (not included) - RF Frequency: 315MHz (FCC) - Number of Buttons: 1 - Channels: 1 - Possible codes: Over 68 billion - Overall Dimensions: 1.24 x 2.16 x 0.31 inches