Get peace of mind with our durable and compliant safety suppliesﾡﾪprotect your team! What is the?2-Wire?Surveillance Mic? The AASTPSRMMSW is a 2-Wire Surveillance Mic for Midland STP portable two-way radios. It has the acoustic tube earpiece on one wire and the microphone with Push To Talk (PTT) button on a separate wire. The 2-Wire arrangement enables the mic and PTT button to be more conveniently located on your body. The acoustic tube earpiece has replaceable tips in several styles to best fit your individual needs.? Works with the Following Radios: Midland STP Radios Why choose the Surveillance Mic? The 2-Wire surveillance mic enables clear easily understood audio even in noisy environments and keeps your communications private. Use this as a public safety/undercover officer to communicate effectively and privately. Recommended Options: Open Ear Insert?- Fits just inside your ear allowing ambient noise to filter thru; choose Left or Right ear when ordering. Hearing Protection Foam Ear Tips?- 29dB noise reduction, one for your acoustic tube, one for your other ear. Replacement Tip?- Have you looked at your existing ear tip lately? Maybe it’s time for a new one.