Cardo HJC 4X Helmet Communication System

Cardo HJC 4X Helmet Communication System

The Cardo HJC 4X is a purpose-built, integrated communication system designed exclusively for select HJC helmet models. It installs flush into compatible helmets for a clean, low-profile fit — no bulky external hardware. Whether you're commuting or canyon carving, the HJC 4X keeps you connected with reliable Bluetooth intercom, premium JBL audio, and smart features that adapt to your ride.

Key Features

• LIVE Intercom: Bluetooth communication for 2 riders up to 0.5 miles with automatic reconnect
• JBL 40mm Speakers: Rich, high-definition sound with tuned audio profiles for music and calls
• Automatic Volume Adjustment: Adapts to ambient noise levels so audio stays balanced at any speed
• Fast Charging: 20 minutes of charge delivers up to 2 hours of talk time
• Over-the-Air Updates: Keep firmware current via the Cardo Connect App
• Universal Bluetooth Connectivity: Pairs with any headset brand, not just Cardo
• Music Streaming: Stream directly from your smartphone via Bluetooth
• Seamless HJC Integration: Engineered for a factory-fit install in compatible HJC helmets

Helmet Compatibility

The Cardo HJC 4X is compatible with the following HJC helmet models:

• RPHA 91
• RPHA 91 Carbon
• RPHA 71
• RPHA 71 Carbon
• RPHA 31
• i71
• i91
• F71
• F31

Specifications

• Brand: Cardo
• Model: HJC 4X
• SKU: UCSF010006
• Intercom Range: Up to 0.5 miles (2 riders)
• Speaker Size: 40mm JBL
• Connectivity: Bluetooth (universal)
• Charging: Fast charge — 20 min for 2 hrs talk time
• Updates: Over-the-air via Cardo Connect App