Inovonics EN1235SF EchoStream Single-Button Fixed Position Hold-up Transmitter, 902-928 MHz, Black

Single-button fixed position hold-up transmitter with rugged design for emergency signaling. Back tamper protection ensures secure mounting and tamper detection. LED indicator flashes with each transmission for visual confirmation of operation. Features frequency hopping spread spectrum technology across 902-928 MHz band with 3-minute check-in intervals. Powered by Panasonic CR2 battery. Compact dimensions: 3.0" x 1.6" x 0.72". UL listed for reliability and safety compliance.