The DS-PM1-I1-WE Single Input Transmitter features a small size design, allowing it to be easily integrated into wired detectors. It supports 868MHz two-way wireless communication and has an LED display to show the real status of the device. The transmitter includes one tamper input and one PGM, which can be used as a zone input or alarm output. It also provides a 3.3V voltage output to power external wired detectors and includes an accelerometer for detecting device removal.