• Tactical Sound Control™ Technology enhances your hearing by 8x while protecting you from high-impact noises in under 2 milliseconds.
• Ultra-Slim Profile
• 21 NRR tested and approved to ANSI s3. 19-1974.
• Bluetooth 5.0 connects, and dual-connects, devices 30+ feet.
• Lightweight Design at just 310 grams.
• Up to 25 Hr Battery Life with 2 AAA batteries.
• SafeMax™ Technology limits volume output to 85dB for all-day, damage-free listening.
• IPX4 Durability for sweat and water resistance
• Noise-Isolating Microphone for clear communication in loud environments.

ISOtunes Sport DEFY Slim BT comes with 2 AAA batteries and an auxiliary cable.