ACE Schakal by Sordin – Active Shooting Earmuff with Custom Headband and Gel Kit. Sordin has been producing hearing protection for over 30 years and this experience shows. Every Sordin is designed and produced in Sweden and demonstrates the highest in quality and precision engineering. Whether you are an avid hunter, shooting enthusiast or employed in law enforcement, Sordin has the right model for you. The ACE Schakal by Sordin takes the combined 50 years of experience of ACE and Sordin and combines it into the perfect hearing protector package. An AUX audio input on the headset let? S you connect radios, cell phones and other communications devices and a waterproof battery compartment ensures reliable operation. ACE Schakal by Sordin. The ACE Schakal by Sordin is rated at NRR 18dB and SNR 25dB. This hearing protector takes the combined 50 years experience of ACE and Sordin and combines it into one device. Powered by two AAA batteries in a waterproof compartment, the ACE Tac by Sordin features 400 hours of battery life and an automatic shutoff when not in use for four hours. On the rear you will find a 3.5mm AUX input so you can connect it with radios and other devices, AUX cable included. The slim cup design prevents them getting in the way. The bottom edge is tapered off making it ideal for right- and left-hand shooters. On the left cup is the easy to use control pad, which controls the volume of the 1:4 ambient sound reproduction. Sordin is known for its cutting edge sound reproduction technology. The SordinHEAR software then amplifies quiet noises around you, making them more audible while dangerous levels of noise are compressed. All this is played back on loudspeakers in each cup in surround sound. This is perfect when you still need to communicate with those around you and maintain situational awareness.