LDG Electronics Z-11PROII Automatic Antenna Tuner 1.8-54 MHz, 0.1-125 Watts, 2 Year Warranty Only 5" x 7.5" x 1.5", and weighing only 18 ounces, it handles 0.1 to 125 watts, making it ideal for both QRP and standard 100 watt transceivers from 160 - 6 meters. 2,000 memories automatically storing tuning configurations for each frequency and band as you use them. Frequency sensing circuitry lets the Z-11Pro know your operating band and frequency. Rugged and easy-to-read LEDs indicate SWR and status