Outdoor Multiband Antenna, Cell, 50 Ft. The BOSCH B40-MB50 is a 50-foot indoor/outdoor multiband cellular antenna designed for improved cellular reception and integration with security and surveillance systems. Lightweight and compact, the antenna is suitable for indoor or outdoor mounting and offers a reliable solution for extending cellular signal in security applications. Product dimensions and weight are provided for ease of installation: Item Dimensions LxWxH: 1 x 1 x 1 inches; Item Weight: 2.14 pounds. Model number B40-MB50. UPC: 800549828048.