ARC T23012 Two-Wire Heavy Duty Surveillance Earpiece Kit. Astra Radio Communication’s Professional Surveillance Kits (Microphones) are covert, low-profile and crystal clear private communication solutions for conveying and receiving critical commands. Our durable surveillance microphones are designed to provide optimal audio quality. Our surveillance microphones include multi-choice, low-profile, flexible, acoustic tubes in Clear, Black or Tan color options. ARC’s hypoallergenic ear inserts and acoustic tubes, multi-directional microphones with PTT control, and noise reduction, assure the highest quality radio communication. Built to the highest standards, ARC's surveillance kits deliver optimal sound quality and durability under the toughest conditions. See pictures for additional details. Compatible with Kenwood NX-210, NX-410, TK-190, TK-2180, TK-2410, TK-280, TK-290, TK-3140, TK-3148, TK-3180, TK-380, TK-385, TK-390, TK-480, TK-481, TK-5210, TK-5220, TK-5310, TK-5320, and TK-5400 two way handheld walkie radios.