Automatically matches antennas from 6 – 800 ohms impedance, or a 10:1 SWR Can be powered by a pair of 9 volt transistor radio batteries in series, providing hundreds of tuning cycles Very low current consumption: 300 mA during turning, nearly zero current (effectively off) when not tuning. Your Z-100 is ideal for battery-powered operations. Uses latching relays, retains tuned setting indefinitely even when power is completely removed Tunes from memory in less than one half second. A full tune will take from 1 to 6 seconds.