Expansion microphones 1 pair. Increase the voice pickup range from 30 up to 70 m2. Two lengths of cable supplied, 1.5 and 2.5 meters. Color: Licorice black. Compatible products: Konftel 250/ 300/ 300IP/ 300IPX/ 300WX/ 300M/ 300MX/ 55WX/ 55W
Battery 300 series Smart Battery 5200 mAh Lithium Ion. One year warranty. Compatible products: Konftel 300W/ 300WX/ 300M/ 300MX