Comtek has developed a complete, long range cueing system providing a performer with first-quality auditory assistance. The RC-216 Recieve-a-Cue system transmits clear high fidelity cues up to 500 feet. Its simple and easy to use. The prompter wears the M-216 wireless microphone transmitter. The performer wears the small PR-216 Companion receiver and neck-loop transductor which transmits the audio to the miniature wireless inductor receiver comfortably concealed in the ear. What's more, it's possible for more than one transmitter to cue the same performer with the additional PR-216. Easily concealed- No wires to the ear, Extremely small and light weight Specifications: Frequency Response: 100 Hz to 10,000 KHz Signal-to-Noise Ratio: Better than 65 dB related to output  Receiver Audio Output Level: 2.5 volts RMS adjustable with volume control Transmitter Modulation Limiter: Soft compressor with 35 dB overload range protection -Attack time--less than 1 ms -Recover time -- 10 ms Connectors: 1/8" mini jack or other optional connectors R.F. Carrier Frequency: 169 to 216 MHZ Receiver Channel Separation: 50 KHz Receiver Channel Selection: Plug-in frequency module Frequency Tolerance: .005% crystal controlled Transmitter Modulation: Frequency modulation up to 30 KHz deviation with 100 microsecond transmitter pre-emphasis System: Range: Usable range up to 500 feet under favorable conditions Antenna: No external antenna, integral with microphone and neck-loop Battery: 9 volt Eveready 522 or equivalent for up to 40 hours of operation of optional nickel-cadmium rechargeable battery for 5 hours of operation. Construction: Impact-resistant cycolac case with shock-mounted .050" glass-epoxy circuit board, easy slide open battery compartment with pull tab. Size: 1 1/16" x 2 1/4" x 3 1/4" (27mm x 57 x 83 mm) Weight: 4 ounces (110 grams) approximate Special Features: Access through input and output jacks for charging batteries, automatic receiver turn-off when output plug is removed, LED operation indicators SYSTEM INCLUDES: One - M-216 transmitter one - Sm-183 0mni-directional lapel microphone one - pr-216 receiver one - ntc-102 neck-loop Transductor One - SM-N Earphone Assembly  one - ir-230 Universal-fit ear canal inductor receiver two - p-1 belt-clip carrying pouches one - c-111 carrying case----- batteries Please specify frequency when ordering Additional Options: Option 1 - Microphone muting switch for quiet audio switching. (M-216 Only) $25.00 more