Astra Radio Communications's New T28Heavy Duty Digital Smart Surveillance™ Series Surveillance Microphone is Designed to Reveal the Full Potential of Today’s Most Popular Smartphone - iPhone. With the SMART PTT™, You Get Easy On-Cable Control of Your iPhone (including iPhone 5) Playback, Which Means NO More Digging for Your Phone Every Time You Want to Answer the Phone, Talk to Siri (iPhone 4s/5 only), or Listen to Music. Plus, Its High-Impact Polycarbonate Microphone and Noise-Isolating Earphone Let You Hear Clearly and Be Clearly Heard. It can take fully control of both iPhone (including iPhone 5) and Android Phone. • Smart PTT™ — On-Cable Control (Siri/Voice Control/Answer/Hang Up/Pause/Play) • Smart Transducer™ — Low-Mass, Wide-Bandwidth Driver for Precision Response • Works with iPhone 3Gs, iPhone 4/4s, and iPhone 5 • Volume Control • Crystal Clear Two-Way Transmission • Knowles Microphone • Kevlar Re-enforced Cables • Multi-Points 360 Degree Clothing Clips • Hypoallergenic Ear Insert (R/L, S/M/L) • Hypo-allergenic Acoustic Tube(Clear, Black, Tan)