Catalog > Consumer Electronics > Security & Alarms > Access Control > Remote Controllers Long Range Transmitter Long Range Transmitter UNI-173TX1 MK1 TX 1 CHANNEL 173MHZ 1KM Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview Long Range (1km max), Hermetically Sealed, wearable Transmitter operating at 173MHz. Intended for frail care and medical applications. Additional Information Frequency 173MHz