Zinc-air batteries required for Noise Killer earplugs. Each battery provides up to 220 hours of continuous operation. All batteries are final sale.

• 6 batteries per pack
• Remain functional for up to 30 days after the removal of the protective tab
• Non-rechargeable

Recommendations:

• To ensure the stated level of active noise cancellation, we recommend changing the batteries before each shooting session;
• When using Noise Killer earplugs, make sure you have spare batteries with you;
• When Noise Killer earplugs are not in use for a long time, remove the batteries from the device;
• Use only zinc-air batteries required for Noise Killer earplugs. Do not use watch batteries as they may damage the device.