Bird Electronic Wattmeter Element Slug 25L2 1.99-2.2 GHz 25WBird Electronic Wattmeter Element Slug 25L2 1. 992. 2 GHz 25W The Bird 25L2 is a precision engineered wattmeter element (also known as a slug), designed for use with Bird Model 43 and compatible RF wattmeters. It allows accurate measurement of RF power within a specific frequency and power range. Key Features: Brand: Bird Electronic Corp Model: 25L2 Frequency Range: 1. 99 to 2. 2 GHz Power Rating: 25 Watts Type: Plug in wattmeter element slug