Essential for those using or operating small and full bore firing ranges, these Rifleman ACH (Advanced Hearing Protection) ear defenders significantly improve communication and safety in live firing environments. The ACH system delivers high quality amplified ambient sound such as human voices/conversations whilst electronically eliminating high decibel background noise such as small arms fire. Combining quality electronic protection and comfort with a lightweight low profile, fully collapsible design, this ear protection is suitable for use with or without helmets. Also features non-reflective olive green rigid plastic cups with fully lined foam ear cushions and adjustable headband (which fits all head/helmet sizes). Protects hearing to NRR21 (and equivalent European standards). Size: one size fits all. Uses 4 x AAA batteries (not included) available separately. Weight: 260g. Colour: olive green.