4" LF driver and 1" HF tweeter | Power rating: 25W RMS, 50W Max | The EXTSPK25 2-way extension speaker can be used with a wide range of radio communication equipment including the bhi ParaPro EQ20 audio DSP range and the bhi Dual In-Line module. | Connect the bare ends of the supplied audio cable to the 4mm binding posts of the EXTSPK25 (+ve red, -ve black) and the 3.5mm mono plug to the extension speaker socket of your radio or receiver. | Single 2-way cabinet speaker supplied with a 2m long fig-8 audio cable (30 x 0.12mm) terminated with a 3.5mm (1/8”) mono jack plug and tinned bare ends