Linear Home Security N/O Wall Mount, Door/Window Transmitter D-21A Availability Usually ships in 1-2 weeks. Linear Home Security N/O Wall Mount, Door/Window Transmitter D-21A Sku: D-21A Competitor's Price: $55.95Our Price: $35.95 21DQuantity: Email a Friend Your friend's e-mail address : Your name: Your email address: Send me a copy?: Send HTML email?: Linear Home Security N/O Wall Mount, Door/Window Transmitter D-21A The Model D-21A Normally Open Wall-mount Transmitter has a normally open input circuit that operates in conjunction with an externally mounted normally open magnetic or mechanical contact. When the external contact closes, the transmitter automatically transmits a two-second digitally coded signal to a companion standard digital receiver. Pressing the test pushbutton on the front of the transmitter will also cause the transmitter to send a signal. Each transmission causes the red LED indicator on the front of the transmitter to light, showing that the transmitter is sending a signal and that the battery is in good condition. General Specifications Encoding Techniques: 8-position DIP switch provided for code setting) RF Carrier Frequency: 303.875 MHz Current Consumption: 12 mA DC transmitting Power: 9 VDC NEDA battery (supplied) Operating Temperature Range: Battery limited Dimensions: 2.4 in W x 4.7 in H x .9 in D (62 x 120 x 23 mm) Features Slimline case design Test/operate switch Test/operate LED 2-second transmission Standard digital format: 256 selectable codes One N/O input loop circuit Loop input screw terminals Powered by one 9-volt battery (included)

Compatible Receivers

		Linear 1-Channel Standard Digital Receiver D-67				Linear 1-Channel Latching Standard Digital Receiver D-67L
		Linear 1-Channel Shielded Standard Digital Receiver DX-12				Linear 2-Channel Standard Digital Receiver D-2R
		Linear 4-Channel Standard Digital Receiver D-4R				Linear 8-Channel N/O Short-to-Common Output Receiver D-8C

Accessories

Omni-Directional Remote Antenna Model Number EXA-1000

Special Orders: All Special Order items require a 50% deposit of the total before ordering. Please call for lead times on Special Order items or request a quote by email or fax. Certain items such as, but not limited to, gate operators, telephone entry systems, card reader systems, access control systems, non-stock transmitters/receivers, any stock or non-stock item we consider to be a special order item, and/or any item being ordered specifically for you are considered a special order. All returns and cancellations within 30 days or exchanges within our 1-year warranty policy are subject to a 50% special order restocking fee. Warranty is void where evidence of misuse or abuse is present.