Professional 18 inch gooseneck uni-directional microphone with 10 foot cord and 3.5 mm monaural plug. Compatible with any machine that has a 3.5 mm powered jack. Dictaphone CPhone, C-Phone, Connexions or Connextions. Microphone length is 18 inches. Also Known As: 184940 or 0184940. The GN-1 Specifications are - Directional Characteristics: Uni-directional, Cardioid Element: Electret condenser, Frequency: 70Hz~16K Hz, Impedance: 600ohm + 30% (at 1K Hz) (RL=680 ohm), Sensitivity: -66dB + 3dB (0 dB = 1 V/microbar, 1K Hz indicated by open circuit), Operating Voltage: DC 1V ~ 9V, Dimensions: 13 mm (Mic Head) x 556 mm, Connector: 3-Pins XLR (Male) 3.5 mm mono plug. Includes: Bare Microphone with 3.5 mm cable.