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Mesh Networking creates near-limitless connections
Mesh is a self-optimizing and self-healing network, always looking for the best connection and seeking a new one when a device disconnects. Cast features two different Mesh modes: Open Mesh and Group Mesh. With Open Mesh, a near-unlimited number of users can connect to each other within an effective range of 1.1 km (0.7mi). For private sessions, Group Mesh supports up to 24 participants. 

Hands-free communication thanks to full-duplex technology
Worksites need communication lines open for safety reasons. Being able to respond without needing to press a button is essential, especially for people working with heavy equipment. Cast helps with these issues by utilizing full-duplex technology, a system that allows people to talk hands-free. Crews can easily communicate and keep their hands free of any distractions while working.

Hearing protection and communications solutions for high noise environments
The Cast headset provides hearing protection while letting you communicate in loud, busy worksites. The headset comes in two styles, each with their respective noise reduction ratings: over-the-head earmuffs (28dB) and hardhat integrated (23dB). It's designed with safety and comfort in mind with a hands-free intercom system and a three-button layout making it easy to control.

Stay in control with the Sena Smartphone App
Connect the Cast to the Sena Smartphone App and instantly be able to customize the headset. Change settings like turning on Mesh Intercom, adjust channel frequency, set up speed dial options, program FM station preferences, and more.

Product Focus

  • Full-Duplex

    Allows simultaneous communications without interruptions.

  • Mesh Networking

    Robust and reliable communications network.

  • Multi-Team Communication

    Communication with different teams across 9 channels.

  • Advanced Noise Control

    Reduces the effects of ambient noise during intercom conversations

Rugged, proven performance

Learn how Sena can meet your communication needs.
Download the Application Data Sheet.

Download PDF

Technical Specifications



  • Headset: 150 mm x 192 mm x 97 mm (5.9 in x 7.6 in x 3.8 in)
  • Speaker Driver Unit: 32 mm (1.3 in) - thickness 7.1mm (0.3 in)
  • Boom Microphone: length - 100 mm (3.9 in)


  •  Over-the-Head: 474 g (16.7 oz)
  •  Hard Hat Mount: 492 g (17.3 oz)


  • Operating Temperature: -10°C ~ +55°C
  • Storage Temperature: 15°C ~ +30°C
  • Charging Temperature: 0˚C – 45˚C


Over-the-Head Earmuff Type:

NRR (ANSI S3.19-1974, US) - 28 dB

Hard Hat Mount Earmuff Type:

NRR (ANSI S3.19-1974, US) - 23 dB


Noise Cancellation:

Advanced Noise Control™


Built-in SBC Codec

FM Radio:

  • Radio frequency specifications: 76 ~ 108MHz
  • 10 preset station memory


Mesh 2.0 Intercom™ Technology


  • Bluetooth 4.2
  • Headset Profile (HSP)
  • Hands-Free Profile (HFP)
  • Advanced Audio Distribution Profile (A2DP)
  • Audio Video Remote Control Profile (AVRCP)


Working Distance:

  • Mesh Intercom™: up to 1.1 km (0.7 miles) in open space*
    *can extend up to 4.4 km (2.8 miles) between a minimum of 6 users (in open space).

Supports up to:

  • Mesh Intercom™ (Open Mesh): virtually limitless users
  • Mesh Intercom™ (Group Mesh): 24 users


Talk Time:

Mesh intercom: up to 9 hours

Charging Time:

2.5 hours

Quick Charge:

20 minutes of charging equals 3 hours



Lithium Polymer Battery


1,100 mAh




Sena Device Manager

Instructions for Firmware Update

Step 1: Download

Download and install the Sena Device Manager on your computer.

Step 2: Update

Update the firmware of your Sena product with the Sena Device Manager.

MS Windows 32-Bit (Windows 7 or Later)

MS Windows 64-Bit (Windows 7 or Later)

Mac OSX (Mac OS 10.8 or later)

Firmware Histories

v1.1.3   October 14, 2022

  • Reduced the maximum volume to meet certification requirements

v1.1.2   June 24, 2022

  • Improved iOS connectivity
  • Improved compatibility with RC3 and RC4

v1.1.1     September 22, 2020

  • Improved audio quality and battery performance during Mesh Intercom
  • Support for iOS 14

v1.0.2   June 5, 2020

  • Minor bug fix with returning to Mesh Intercom conversation after SR10 is disconnected

Mobile App



Data Sheet


Certificate of Conformity