Inovonics EN1233S Single-Button Necklace Pendant Transmitter

The Inovonics EN1233S is a single-button wireless necklace pendant transmitter designed for personal alarm, emergency signaling, and compatible security notification systems. Featuring 902-928 MHz EchoStream frequency-hopping spread spectrum technology, three-minute supervision check-ins, and an LED transmission indicator, it provides portable alarm activation through a single push button. The pendant operates on a replaceable 3V CR2 lithium battery with a typical service life of 3-5 years. Its compact housing measures 3.0 x 1.6 x 0.72 inches and includes a necklace for wearable operation or optional fixed-position mounting.

Inovonics EN1233S EchoStream Single-Button Wireless Necklace Pendant Transmitter

The Inovonics EN1233S Single-Button Necklace Pendant Transmitter provides portable wireless emergency and assistance signaling for compatible Inovonics EchoStream security and notification systems. Manufactured by Inovonics Wireless Corporation, the EN1233S features a single push-button actuator, integrated transmission LED, and included necklace for convenient wearable operation. Users activate the transmitter by pressing and holding the button for at least one second, causing the device to send an alarm signal to a compatible receiver or network coordinator. The pendant can also be mounted in a fixed position for applications requiring a dedicated wireless activation point. Its compact design supports personal emergency signaling, staff assistance requests, and security notification in commercial facilities, institutional buildings, residential care environments, and other locations equipped with compatible EchoStream infrastructure.

The EN1233S incorporates Inovonics EchoStream frequency-hopping spread spectrum (FHSS) wireless technology, operating in the 902-928 MHz frequency range for North American installations. The transmitter uses multiple radio frequencies to communicate with compatible system receivers, helping maintain signal transmission in environments containing other wireless equipment. Each pendant contains a unique factory-programmed identification number used during receiver registration and device supervision. When configured for supervised operation, the transmitter sends a check-in message approximately every three minutes, allowing the connected system to monitor device communication. Pressing the activation button initiates multiple alarm transmissions, confirmed by a flashing LED, while releasing the button generates an alarm restoration signal. The EN1233S also supports regional frequency configurations of 915-928 MHz for Australia and 921-928 MHz for New Zealand through its internal frequency selection jumper.

The Inovonics EN1233S operates on one replaceable 3V Panasonic CR2 lithium battery, providing a typical service life of three to five years under supervised operating conditions. The pendant measures 3.0 inches long by 1.6 inches wide by 0.72 inches deep (76 x 40 x 18 mm) and weighs approximately 1.6 ounces (45 grams). Its specified operating temperature range is 32 F to 140 F (0 C to 60 C), with relative humidity tolerance up to 90% non-condensing. The rugged enclosure supports wearable use with the included necklace and is compatible with the optional ACC603M metal necklace and ACC603P plastic necklace. Battery replacement requires opening the housing, installing the correct CR2 battery, and pressing the internal reset button to initialize the transmitter. The manufacturer recommends testing the pendant after installation, registration, and battery replacement to verify proper communication with the receiving equipment.

The EN1233S integrates with compatible Inovonics EchoStream receivers and wireless infrastructure, including the EN4000 Universal Serial Receiver, EN4200 Security Only Serial Receiver, EN4204R Four-Zone Receiver, EN4216MR 16-Zone Receiver, and EN4232MR 32-Zone Receiver. Compatible installations can also incorporate EN5040 Series high-power repeaters to extend wireless coverage and support communication throughout larger facilities. The EN1233S differs from the EN1233D dual-button necklace pendant, which requires simultaneous activation of two buttons, and the EN1235S single-button belt-clip pendant, which is designed for belt-mounted or fixed-position use. The transmitter is FCC Part 15 compliant and RoHS compliant, and Inovonics specifies a three-year limited manufacturer warranty. The EN1233S is a wireless transmitter only and requires a compatible receiver, control panel, or monitoring infrastructure to generate the intended alarm response. System installers must verify wireless coverage, program the device's identification number, configure the appropriate alarm response, and test activation and restoration before placing the pendant into service.