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  • ELK Two-Way Wireless Technology — Product Line Specifications

    September 08, 2026 3 min read

    Overview and specifications for ELK's Two-Way Wireless technology line: the M1XRFTW transceiver plus keyfob, door/window, and universal 3-zone sensors compatible with the ELK M1 Control.

    Full text manual (for reference)

    Product overview and specifications for ELK's Two-Way Wireless technology for the M1 Control — a lineup of two-way wireless sensors and the M1XRFTW transceiver that revolutionizes reliability and functionality of wireless peripherals for homes and businesses.

    Two-Way Wireless Overview

    ELK's industry-leading two-way wireless technology for the M1 Control revolutionizes the reliability and functionality of wireless peripherals for homes and businesses.

    • Full, true two-way signal acknowledgement
    • Ensures verification of the current state of all sensors through active two-way auto sync
    • Assures installation confidence through signal quality and status LED indicators
    • Constantly monitors and adjusts ideal RF power level to deliver clear signal while maximizing battery life
    • Utilizes 900 MHz frequency-hopping spread spectrum to increase signal diversity and agility, ensuring the signal gets through

    In true two-way communication, sensors transmit signals and re-send if acknowledgement is not received. The M1 Wireless Transceiver transmits signal acknowledgement and system status back to each sensor — "The ONLY Way is Two-Way!"

    M1 Wireless Transceiver — ELK-M1XRFTW

    The M1XRFTW two-way wireless transceiver allows an ELK-M1 or ELK-M1EZ8 control to accept ELK's complete line of two-way wireless sensors.

    Zone Capacity Up to 144 individual wireless zones (sensors/points)
    Data Bus Operates from the 4-wire RS-485 Data Bus; multiple receivers may be connected to a single M1 or M1EZ8 control for redundancy and greater coverage
    Firmware Flash memory for firmware updates
    Operating Frequency 902 MHz to 928 MHz
    Sensitivity >105 dBm
    Operating Temperature 0 to +120°F
    Operating Voltage 12 Volts DC
    Current Draw 25mA receiving, 85mA transmitting
    Housing Dimensions 6.75" x 4.69" x 1.13"

    Compatible Two-Way Wireless Sensors

    Four Button Keyfob — ELK-6010

    This wireless keychain remote (fob) provides 4 push buttons, LED feedback indicator, and Elk's industry-leading two-way technology. From the remote, it's possible to arm, disarm, check status, and trigger a panic alarm.

    • Compatible with ELK-M1XRFTW two-way wireless transceiver
    • Status inquiry button & LED indicator provide arm, disarm, and alarm memory status
    • 902–928 MHz frequency hopping
    • Size: 1.37"W x 2.44"L x .52"D
    • Welded case for enhanced water resistance, non-replaceable battery (typical life: 5 years)

    Slim Line Door & Window Sensor — ELK-6020

    This slim wireless door & window sensor is ideal for door and window applications and features Elk's industry-leading two-way technology.

    • Compatible with ELK-M1XRFTW two-way wireless transceiver
    • One built-in reed switch; front and back tamper option
    • 902–928 MHz frequency hopping; maximum operating gap of reed: 1/2"
    • 3.6V ER14250 lithium battery
    • Size: .71"W x 3.4"L x .8"D; magnet: .57"W x 1.5"L x .6"D

    Mini Window Sensor — ELK-6021

    This exceptionally thin wireless window sensor is perfect for double-hung and casement style wood/vinyl windows and features Elk's industry-leading two-way technology.

    • Compatible with ELK-M1XRFTW two-way wireless transceiver
    • One built-in reed switch
    • 902–928 MHz frequency hopping; maximum operating gap of reed: 3/8"
    • 3V CR2032 lithium battery
    • Size: 1.1"W x 2.3"L x .25"D; magnet: .37"W x 2.3"L x .25"D

    Universal 3-Zone Sensor — ELK-6022

    This universal sensor has 1 built-in reed switch plus 2 external closed-circuit zone inputs, allowing it to secure up to 3 doors, windows, etc. It also features Elk's industry-leading two-way technology.

    • Compatible with ELK-M1XRFTW two-way wireless transceiver
    • One built-in reed switch; two zone inputs for external contacts
    • Front and back tamper option
    • 902–928 MHz frequency hopping; maximum operating gap of reed: 1/2"
    • 3V CR123A lithium battery
    • Size: 1.5"W x 3"L x .9"D; magnet: .57"W x 1.5"L x .6"D

    Coming soon at time of publication: ELK two-way PIR, smoke detector, glass break sensor, water sensor, temperature sensor, sounder, and more.