1ft 3.5mm TRRS Jack to RJ9/RJ10 iPhone/ iPod/ iPad Headset to Cisco Office Phone Adapter Cable This adapter converts an iPhone, iPod, iPad TRRS 3.5mm headset to a 4P4C Cisco headset plug. Features: * (1) 3.5mm TRRS female jack * (1) 4P4C male plug * Use your existing iPhone/ iPad, or similar TRRS headset with your Cisco-based phone * Avoid having to purchase an expensive Cisco headset * Great for home businesses, offices, call centers, and more * Eliminates the need to have more than one headset * Length: 1ft This Cable adapter is compatible with: Cisco System Cis IP Phone 7940, 7940G, 7941, 7941G, 7942, 7945, 7960, 7961, 7960, 7960G, 7931G, 7965, 7970, 7971, 7975 and all series. PLANTRONICS M10, M12, M22 & MX10 Vista.