Universal Intercom Belt Pack
JK Audio Outerloop Front

In the Loop, Out of Bounds.

Outerloop™ functions as a wireless link to your intercom system. This universal belt pack provides connections for your existing 4-pin or 5-pin intercom headset, routing audio through your mobile device over a Bluetooth wireless connection. Use your mobile device to call into your intercom phone bridge, station phone coupler, or any phone-based intercom app such as Unity Intercom or Clear-Com® Agent-IC. In Phone mode, Outerloop pairs to your cell phone, notepad, or computer just like any other Bluetooth headset. In Headset mode, you can pair to another Outerloop or to a standard Bluetooth headset, providing a short range secure wireless point-to-point intercom.

Learn More Details Specs

Product Details

Features OL 3.5
HD Voice Compatible (7 kHz Wide-Band Speech)
Connects to Headsets, Phones, & Notebooks with Bluetooth Wireless Technology
Connects to Phones and Notebooks with 4-conductor 3.5mm Headset Interface
4-pin and 5-pin Male or Female Headset Jacks
Send and Receive Volume Controls
Push-On, Push-Off Talk Button
Recessed Sidetone Level control
Number of hours on one 9 Volt Battery 10hr >20hr
Made in America
Approved for Sale in Europe and Australia


Adapting to the mixed-up intercom world, model OTL-F features both 4-pin and 5-pin Female XLR headset jacks, while model OTL-M features both 4-pin and 5-pin Male XLR headset jacks. Easy-to-use send and receive level controls, a push-on, push-off Talk button, as well as a recessed sidetone level control. All the comforts of a standard belt pack whether you are around the corner or around the world.

Increased Range

While Outerloop™ will work with any Bluetooth enabled headset, most headsets were designed to work a short distance from the phone. JK Audio Interloop and BlueSet offer increased range and performance making it the perfect match.

JK Audio Outerloop-F Back
JK Audio Outerloop-M Back


Model Outerloop-F
Headset 4-pin Female XLR, 5-pin Female XLR
Model Outerloop-M
Headset 4-pin Male XLR, 5-pin Male XLR
Headset Microphone
Impedance 50-2000 ohms
Headset Earpiece
Load Impedance 50-600 ohms
Power >50 mW into 150 ohms
Bluetooth Wireless Technology
Standard Bluetooth 3.0
Profile Hands Free (HF)
Distance 66 ft (20 m)
Frequency Response Hands-Free (Full Duplex): 300 Hz– 3.4 kHz
Hands-Free (Full Duplex HD): 50 Hz– 7 kHz
Power 9 VDC Battery
Size 4.7” x 3.75” x 1.65” (12 x 9.5 x 4.2 cm)
Weight 10 oz (275 g)
*HD Voice: While standard phone calls have a narrow bandwidth of 300 Hz to 3.4 kHz, HD Voice calls offer 50 Hz to 7 kHz bandwidth. The additional 1.5 octaves on the low end gives voice a more natural sound, while the additional upper octave dramatically improves speech clarity and intelligibility.

*Wireless HD Calls: To take advantage of this extended bandwidth, both phones on the call must support HD Voice, and both phones must be on the same carrier, in coverage areas that support HD Voice.