s FV Line of headsets are Cool For School The latest design has a sleek appearance and offers rugged durability for everyday use. Kids and adults will be proud to sport our newest midsized headset to use with their tablet, computer, mobile device, almost anything. The FV series features compatibility with the latest technology by including a 3.5 mm. TRRS plug, in-line microphone and 5 foot braided, nylon cord. Ideal for classroom use, individual use and testing. Available in blue and gray.Features. Speaker unit - 40 mm.. Impedance - 32 Ohms. Sensitivty - 100/-3dB at 1KHz, 5mW. Frequency respond - 20Hz~20KHz. Rated Input Power - 15mW. Maximum Input Power - 150mW. Cable length - 5 ft.. Plug - TRRS 3.5 mm. stereo. In-Line Mic