Bosch BT-4 Large Earcones

Built for reliable communications in security, surveillance and monitoring environments, the RTS Bosch BT-4 Large Earcones deliver a comfortable, secure in-ear fit and clear audio reproduction for professional teams. These BT series earcones are specifically designed to mate with Telex Telethin drivers and the Bosch/RTS ET-4 eartube, ensuring clean signal transfer and consistent voice clarity when using pro microphones and headsets. Supplied as a pack of 5, the BT-4 earcones make it simple to stage replacements for frontline operators, reducing downtime and keeping headsets mission-ready. The large-size profile offers better sealing for users who need improved isolation in noisy control rooms or field operations, while the replaceable design supports hygiene protocols and straightforward maintenance. Ideal for security officers, surveillance technicians, and monitoring staff who depend on dependable in-ear audio, the BT-4 earcones are a practical, cost-effective accessory for professional headset systems. Order a pack to outfit your team or swap out worn earcones and maintain optimal communications performance.

• Comfortable, secure in-ear fit reduces fatigue during long security and surveillance shifts
• Clear, unobstructed audio from Telex Telethin drivers for reliable monitoring and communications
• Large-size BT-4 earcones designed to work seamlessly with Bosch/RTS ET-4 eartubes
• Packaged quantity of 5 for easy replacement and reduced downtime in professional deployments
• Durable, hygienic design lets teams swap earcones quickly to maintain performance and cleanliness