Klein Tools Cat. No. AESEM1S Earmuffs are engineered to incorporate both Situational Awareness and Bluetooth® technologies for connectivity to surroundings and music. The dual-knob design featuring unique grooves for easy identification enables users to precisely adjust their Situational Awareness or Bluetooth® volumes. Ergonomically designed vented headband provides cool comfort for all-day wear. These earmuffs charge in 2 hours, providing 25 hours of runtime.

• SMART SENSE featuring situational awareness technology allows users to safely listen to their surrounding environment and instantly identify potential hazards.
• Intuitive amplification of low-level sounds enhances clear communication between co-workers.
• High impulse, impact or constant sounds are compressed down to a safely listening level of 85dB.
• Enjoy premium audio quality with rich bass, clear mids and crisp treble through the latest Bluetooth® 5.1 technology.
• USB-C rechargeable battery offers up to 25 hours of runtime on a single charge.
• Noise Reduction Rating (NRR) of 23 protects and prolongs your hearing.
• Dual-knob design with unique grooves enables independent control of SMART SENSE and Bluetooth® volume.
• Vented headband provides cool comfort in the hot summer months.
• Soft memory-foam ear cushions designed for all-day use.
• Noise canceling microphones eliminate background for crystal clear calls in loud environments.
• Durable construction with 6.6-Foot (2 m) drop protection and IPX4 rating.