Gemini UHF-216M 16-Channel UHF Wireless Systems: * High-quality (dual channel) UHF receivers with 250" range * 16 operating frequencies per channel between 682MHz and 697MHz * Phase Locked Loop (PLL) circuitry for increased reception * RF and AF LED indicators for monitoring incoming signal strength * Auto mute with squelch control and built-in noise reduction * Front panel output level controls * Low battery LED indicators * Microphone On/Off switches * 2 unidirectional, handheld dynamic microphone transmitters