Description Model H6740-M Behind the Head (BTH) Style Rated Intrinsically Safe with FM Approval (Approved to IS / CSA / ATEX / IECex standards) PTT button conveniently located on headset ear dome Behind-the Head, dual ear style Undercut, Comfort-Gel ear seals for maximum comfort Quality components and rugged construction Part Number: 40416G-58 Also available: U6710 inline PTT body switch, see 'Modular' tab at bottom of selector guide page.
