Seco-Larm HL-951T1-SQ 900MHz 1-Button RF Transmitter

The ENFORCER 900MHz HL-series RF transmitters and receivers use digital modulation for improved immunity to interference, better signal penetration in environments with heavy obstructions, and significantly longer range of up to 1,800ft (550m) line of sight. The transmitter's ultra-low power consumption gives you longer battery life with easy to obtain coin-type batteries (CR-2032)

• 917MHz Frequency
• Wide voltage range, 10~24 VAC or 9~48 VDC, for more applications 
• Over 2.028x10³¹ (20.28 nonillion) possible codes to thwart code crackers and potential for duplicate codes
• PCB antenna – no external antenna to be installed, adjusted, vandalized, or damaged
• Five individually programmable output modes
• Up to 99 button codes per channel
• Available with 1 or 2 channels to control 1 or 2 devices 
• Programming by switch, no need to cut jumpers
• LED Indicates RF reception and programming functions
• RF Signal strength / site survey test mode to find optimal installation location
• Compatible with all HL-series transmitters of same frequency