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August 31, 2026 3 min read
Installation and programming instructions for the Napco GEM-WP Panic Transmitter — a single-button emergency pendant/keychain transmitter for Gemini and NAPCO Express systems.
Installation and programming instructions for the Napco GEM-WP Panic Transmitter — a single-button pendant/keychain emergency transmitter compatible with Gemini and NAPCO Express control panels.
The GEM-WP is a single-function pendant/keychain transmitter compatible with all Gemini and NAPCO Express control panels when used with the appropriate wireless receiver:
It serves as an emergency device for police panic and/or auxiliary emergency signaling. Two replaceable Energizer 386 1.5V silver oxide cells power the transmitter. Press the button momentarily to transmit the alarm signal to the Central Station — the LED lights while transmitting.
Batteries are checked automatically during any transmission. A low-battery condition causes the LED to stay on for twice the normal time, then pulse about once every 1.5 seconds; a low-battery report is sent to the receiver.
Refer to your control panel/keypad instructions for detailed programming steps. For each unit you need:
If more GEM-WP transmitters are needed, the GEM-P1632, GEM-P3200, and GEM-P9600 panels support mapping a GEM-WP directly to a zone:
Caution: Do not remove the JP1 jumper on the circuit board.
The GEM-WP includes a plastic bead neck chain:
Napco warrants its products free from manufacturing defects in materials and workmanship for 36 months from the date of manufacture. Napco will, at its option, repair or replace any product failing to operate correctly within that period, at no charge to the original purchaser. This warranty does not cover equipment repaired by others, improperly installed or used, abused, altered, damaged, subjected to acts of God, or with altered/removed serial numbers. There is no warranty beyond the description stated, and no warranty of merchantability or fitness for a particular purpose. Napco recommends the entire system be tested weekly.
Manufacturer: Napco Security Systems, Inc., 333 Bayview Avenue, Amityville, New York 11701. Sales/Repairs: (800) 645-9445. Technical Service: (800) 645-9440.
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