ALS-216 COMTEK® Wireless Communication System


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SKU: 15-050 Categories: , ,

The COMTEK Wireless Listening System is a one-way communication system offering perfect speech clarity over distances as far away as 300 feet. It overcomes the hearing challenges of distance between instructor and student, and its rugged construction ensures long lasting durability in the most demanding environments.

The COMTEK System has 60 channels. You can add up to 100 additional receivers off the main transmitter for small or large groups. Uses regular 9V battery or 9V rechargeable batteries.

• 1- M-216 wireless microphone transmitter w/ microphone mute switch USER MANUAL(PDF)
• 1- PR-216 receiver and earphones USER MANUAL (PDF)
• 1- CM-183 RT omni-directional lapel microphone
• 1- Snap-on belt clip
• 2- regular 9V batteries
• Carrying case

Additional Information

Weight 1 lbs


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Audio Input:
• Microphone input impedance for electret type microphone – 3k ohm
• Aux/Line input impedance – 10k ohm at 0 dB nominal

• Microphone – Micro-mini 2.5 mm mono (locking or non-locking)
• Auxiliary – Mini 3.5 mm Stereo
– Audio – Tip and Sleeve
– Battery Charging – Tip and Sleeve
– External 9V power – Ring and Sleeve

Controls and Indicators:
• Power On/Off switch
• Synthesized channel selection switches
• Microphone mute switch (Optional)
• Audio input gain control
• Modulation voice level indicator

Antenna System: Body-worn microphone cord or whip antenna plugged directly into microphone connector when auxiliary input it used

Frequency Response: 80 Hz to 10 kHz

• 5 kHz deviation Ch. 1-40 (non-companded)
• 10 kHz deviation Ch. 41-60 companded

RF Power Output: 10 mW to the antenna system

Out-of-Band Emissions: Better than 45 dB below carrier

Current Drain: 17 mA constant current

Weight: 4 ounces (110 grams)

• 9 V alkaline for up to 35 hours of operation
• 9 V Nickel-Metal Hydride rechargeable for up to 15 hours of operation

Dimensions: 1 1/6” x 2 1/2” x 3 1/4” (27 mm x 57 mm x 83 mm)


Audio Output: Headset output +16 dBu (low impedance)

Connector: Stereo/mono 3.5 mm audio output connector

Indicators: LED Power/Battery indicator

• Power On/Off switch
• Volume control (50 dB range)
• 99-position rotary channel selector switches

Audio Frequency Response: 80 Hz to 12 kHz

Harmonic Distortion: Less than 1% (80% modulation)

Operating Radio Frequency: 216-217 MHz

Frequency Stability: 0.002% frequency synthesized crystal controlled

RF Sensitivity: 0.5 uV for 12 dB SINAD

Adjacent Channel Rejection: 65 dB 50 kHz off-channel

Spurious Rejection: 60 dB (image excluded)

Ultimate Quieting: Better than 95 dB Companded Channels

Deviation Acceptance: Up to 10 kHz

Antenna: Integral with output cable

Current Drain: 15 mA nominal

Power Requirements: 9 volt alkaline battery or rechargeable nickel metal hydride

Dimensions: 1 1/6” x 2 1/2” x 3 1/4” (27 mm x 57 mm x 83 mm)