The LPFM-ant1 is a circularly polarized antenna designed for low power FM stations.  Circularly polarized antennas are used to reduce multipath distortion in mobile receivers.
The ARK Portable Repeater is a rugged stand-alone VHF or UHF repeater designed for quick deployment from helicopters.  It is fully self-contained and solar powered.  Uses include anything where fast deployment is critical.
The hornblower is used to sound a vehicle horn when an incoming call is detected by a cellular telephone a car kit. The HORNBLOWER is widely used by industrial and commercial customers who need to leave their phone in their vehicle when on site. Size 50x40x30 mm. 12 volt DC, 100 mA maximum sink capacity. Tone detection range 1 - 3.5 KHz.
The TWIN provides convenient interconnection of telephone equipment to 2-way radio systems. It is compatible with simplex and duplex systems and can provide DC remote capability using common telephone equipment.