Check the listing for details. Linear MegaCode Key Ring Transmitter & Weigand Proximity Tag, 1-Ch (ACT-31DH). Color: N/A, Condition: New. Listed at 36.94 USD. Conveniently gain entry through your Linear access control system with the Linear MegaCode Block Coded Key Ring Transmitter & Weigand Proximity Tag (1-Channel). The single-button miniature transmitter sends one wireless code to any Linear MegaCode access control receiver or and control panel, allowing you to control MegaCode door/gate access systems and garage door openers.Ideal for door, gate, and garage door operatorsEliminates need for separate proximity cardsRugged construction for long-term everyday useComes with quick-disconnect key ringCompatible with MegaCode products and 26-bit Weigand readers Enhanced Security with MegaCode Technology The transmitter is in MegaCode format, which means each transmitter is factory preprogrammed with one of over 1,000,000 codes, virtually eliminating the possibility of code duplication. Because the receiver "learns" each specific code, no unauthorized person can gain access to the system by reprogramming a transmitter. Additional Features A unique 10-second time-out feature prevents the system from being shut down by a single transmitter transmitting continuously. The transmitter also contains a 26-bit Wiegand proximity tag programmed to the same block code as the transmitter. The tag is compatible with the AM-DPR Dual Proximity Reader. Waving the transmitter near the reader will request access from the system.ContentsTransmitterKey RingBatteries (pre-installed) NOTE: The Weigand proximity tag is designed to work with Linear's model AM-DPR Weigand proximity reader. While third-party 26-bit Weigand readers may also be compatible, not all have been tested.Technical DetailsMPN: ACT-31DHUPC: 093863119958Power: Two type 2016 coin cell lithium batteriesBattery Life: 5 yearsCodes: Factory block coded in MegaCode formatRF Frequency: 318 MHzProximity Format: 125 KHz non-proprietary proximity, 26 bit WiegandDimensions: 1.25(W) x 2.25(H) x 0.48(D) inchesWarranty: 1 Year