The TC-10U is a battery-powered door / window contact and wireless transmitter for the RCTD-20U (Wireless 2000). When used as a wireless transmitter and installed in the backbox of any of OPTEX's battery operated detectors, extended detection range and wireless notification to your RC-20U chime box is achieved. Instantly monitor larger areas with minimal false alarms for a greater sense of protection. When used as a door contact, the TC-10U will send a signal to the RC-20U receiver chime box. This gives the user a notification when the door is opened, and is perfect for high traffic areas around entrances where an above door sensor is not practical.
***Products are backwards compatible and will work with the RC-10U Series***
The RC-20U is the reciever / chime for the RCTD-20U (Wireless 2000). The device is powered by a AC adaptor (included), and up to nine TD-20U's can be added to one RC-20U receiver. (With an additional three added to a latching zone) In addition, the RC-20U includes a Form-C relay for activating additional devices such as lights, a camera, door lock, ect.
***Products are backwards compatible and will work with the TC-10U & TD-10U Series***
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45 Cain Drive, Plainvew, Ny 11803 
516-249-8800
sales@dsgdist.com