The Bird 43 Thruline Wattmeter is a high-quality wattmeter designed for radio communication equipment. Made in the United States by Bird, this meter is compatible with coaxial dynamics systems. It is a reliable and accurate tool for measuring power levels in your radio setup, ensuring optimal performance and efficiency. With its sturdy construction and precise measurements, the Bird 43 Thruline Wattmeter is a valuable accessory for any radio communication enthusiast or professional.