• Enclosure: 4.75 in. x 2.25 in. (Diameter x Depth) Black, ABS plastic base with slip-resistant feet and 3 x AAA battery housing for optional audible message on button press Red, ABS plastic, spring-loaded push button
• Electronic Signaling: Battery-powered filter circuit with integrated 319.5 MHz (crystal-controlled) Interlogix-compatible transmitter with 64-minute supervisory interval
• Sensing Interface: Filtered, normally open (i.e. when not pressed), momentary contact switch
• Battery Life: Replaceable 3x AAA battery: 2+ years

The Inovonics single-button fixed position hold up transmitter features a rugged design with simple, single-button activation, and a back tamper for tamper protection.

Features:

• Easy single-button activation
• Include back tamper for secure fixed position alarm signaling
• LED flashes with all transmissions, ensuring operation at a glance
• UL listed

The M1XRFTWM two-way wireless transceivers allow an ELK-M1 or ELK-M1EZ8 control to accept Elk's complete line of two-way wireless sensors. The ELK-M1XRFTWM has been optimized to provide superior signal reception and reliability in multi-transceiver applications.
The ELK-M1XRFTW has been replaced by the ELK-M1XRFTWM. The ELK-M1XRFTWM performs all the functions of the ELK-M1XRFTW and is suitable for single or multiple transceiver installations.
DO NOT mix ELK-M1XRFTW and ELK-M1XRFTWM transceivers in a single M1 installation.
Includes:

• Two Way Wireless Transceiver
• Plastic Housing
• (4) #6 Plastic Anchors
• (4) # 6 Pan Head Sheet Metal Screws
• Instructions