BS121 base station

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This is a Clear-Com BS121

  • Single-channel 2.4GHz Base Station
  • 2.4GHz license-free operation
  • 1 full-duplex or 4 push-to-transmit shared beltpacks
  • Up to 8 systems can be linked together
  • Interface option available to 4-wire intercom systems only
  • Portable, compact design
  • Built-in battery charger

Technical Specifications

Frequency Range:

2400-2483.5 MHz

Frequency Response:

200 Hz to 3.5 kHz

Power Requirements:

100–240VAC, 50-60Hz or 12-14VDC

Temperature Range:

.-4-131°F (-20-55°C) Typ.


4-Wire I/O:

600 Ω balanced, level adjustment

Headset I/O:

.200 Ω balanced, level adjustment

Antenna Type:

External, dual diversity ½-wave dipole
(R-TNC connector)

System Distortion:


Communication Security:

64-bit encryption dual slot diversity

Transmission Modes:

Continuous (Latched) or Push-to-Talk (PTT)

Transmitter Specifications


Frequency-Hopping, Spread Spectrum (FHSS)

Transmit Power:

100mw Burst

Modulation Type:

Gaussian filtered FSK, TDM

Frequency Stability:

13 ppm


Exceeds FCC and ETSI specifications over temperature

Receiver Specifications


Frequency-Hopping, Spread Spectrum (FHSS)

RF Sensitivity:

.<-90dBm w 10-3 BER

Frequency Stability:

13 ppm



FCC License:

.Not Required

Features and/or Benefits

Portable and Versatile

Highly portable and versatile system that can be plugged directly into the headset jack of any intercom station or into a 4-wire connection of a device such as a digital matrix intercom.

Frequency-Hopping, Spectrum-Friendly

Encryption Technology ensures confidential communication. Allows up to eight DX121’s to be used together to support multiple channel applications. Approved for worldwide use.

4-Wire Connectivity and I/O Connection

Interfaces to 4-wire/matrix intercoms and radio based communication systems. Assignable relay closure for advanced functionality. 600 Ω balanced, level adjustable.

Shipping & Returns

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Shipping Options

We offer free ground shipping on most items for orders $300 and over, $20 for flate rate ground shipping on orders from $150 to $299.99, and $14 flat rate ground shipping on most items for orders under $149.99. *paints, liquids, and large volume items like boom bases (very heavy) or fake snow (not heavy, but very large) may incur a shipping surcharge. Exclusion of items from Free and Flat Rate shipping is at ProAdv's discretion. Offer is currently limited to Lower 48 US States.

We ship to North American addresses. Note that there are restrictions on some products, and some products cannot be shipped to international destinations, or even certain states depending on the item and state or local laws.

Our full policy is in our Terms and Conditions page.
Pandemic Availability Notice

Please Note: Due to unprecedented raw material and component shortages for finished goods throughout our industry, lead times for items that aren't currently in stock are longer than normal and cannot be guaranteed at present. Equipment needed by a firm date must be noted at time of order. While VLS cannot guarantee delivery by those dates, we will work with our suppliers to do everything possible to meet deadlines. We apologize for the inconvenience and appreciate your patience.

Same Day Shipping Cutoff time
(Due to Pandemic-related availability issues, this policy is currently suspended)

Online orders received by noon Eastern time typically ship the same day. If your delivery due date is critical please note your due date in the order messages at checkout, and then contact us.

Why Noon? Well, while we stock quite a few items in our warehouse, many items we have dropshipped by our vendors. They need time to process the order, so to ensure that we can get the order to the vendor and give them enough time to ship it out the same day, we need to get the order to them as early as possible in the day.

Shipping Rating

Please also note that the shipping rates for many items we sell are weight and dimension based, as this is the method that FedEx and UPS use to rate the package's cost to ship.

Returns Policy

We understand things happen and items occasionally need to be returned. To make things as hassle-free as possible, we have dedicated pages about our Returns Policy (what’s eligible to be returned) and our Return Process (how to go about returning eligible items)

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