This single, high quality earpiece is fully adjustable and designed to hook over either the left or right ear with a soft earpad for comfort. This earphone produces crystal clear sound whilst the design allows for outside sound to be heard, making this ideal for mobile and security communications.Cable : length[tab]1.2m[br]Connector[tab]3.5mm mono jack[br]Frequency response[tab]20Hz-20kHz[br]Impedance[tab]32 Ohms (±10%)[br]Sensitivity[tab]99dB (1kHz)[br]Speaker size[tab]22mmØ