The mAT-10 is a compact and exquisite tuner designed for YAESU FT-817/818, it can also be used in other QRP transceivers. When it is connected to FT-817/818 through a dedicated data cable mAT-CY, it is a dedicated tuner, which can achieve convenient "one-key tuning". If no data cable is used, it is a universal QRP tuner for all low-power transceivers. The mAT-10 is connected to the ACC port of the FT-817/818 transceiver through data cable. The ACC interface allows an external device such as a PC or the mAT-10 to control the FT-817/818 by sending it serial commands. The mAT-10 has the function of "one key tuning". When the multi-function key on tuner is pressed, the mAT-10 will automatically control the start-up tuning of transceiver. When mAT-10 is used in other QRP transceivers, it does not need data cables and can work only by connecting RF cables. The tuning process can be completed by pressing the Multi-function on the panel, its operation is very simple. The tuner can work within the range of 1.8MHz to 54MHz, at power levels up to 30 watts. It will tune dipoles, verticals, Yagis, or virtually any coax-fed antenna. It will match an amazing range of antennas and impedances, far greater than some other tuners you may have considered, including the built-in tuners on many radios. The mAT-10 has 16,000 frequency memories. When tuning on or near a previously tuned frequency, the mAT-10 uses "Memory Tune" to recall the previous tuning parameters in a fraction of a second.If no memorized settings are available, the tuner runs a full tuning cycle, storing the parameters for memory recall on subsequent tuning cycles on that frequency. In this manner, the mAT-10 "learns" as it is used, adapting to the bands and frequencies as it goes. You can also start a tuning cycle manually whenever necessary. Two 10440 lithium batteries are installed in the interior of the mAT-10, which provides power for the tuner. Because of the use of advanced magnetic retaining relays, the power consumption of mAT-10 is very small, the lithium battery can work for a long time after it is fully charged. It is very suitable for outdoor use. You must use its own charger to charge the tuner. It is dangerous to charge with an incorrect charger. Colour: Black material: metal Package Contents: 1 x mAT-10 HF Automatic Antenna Tuner Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.