The latest firmware version is 3.2：

-SWR greater than 1.1 will automatically activate tuning,and the minimumpower has been changed from 5W to 1W. 3.2 Program can be tunedbelow 5W.However, Too low value may result in insufficiently fine tuning(originaldefault is greater than 5W auto tuning) , please know this beforeplacing an order.

Parameter Description:

-Power supply range: 10-15 VDC

-Max current: 450mA

-Max working power: 100 watts

-Max measured power: 150 watts

-Minimum power for tuning start: 1 watt

-Recommended maximum power while tuning not above 30watts. (after tuningyou can set 100 watts and work on this power)

-Minimum measured power: 0.1 watt

-Step for measurement on powers under 10 watts: 0.1 watt

-Step for measurement on powers above 10 watts: 1 watt

-Power measurement accuracy: 10%

-Maximum inductance set: 8.5 uH

-Minimal step for setting inductance: 0.1 uH

-Maximum installed capacity: 1870 pF

-Minimal step for setting capacity: 10 pF

Package Included:  Weight:550g

-1 x Assembled Automatic Antenna Tuner machine with Shell（No battery）

-DC5.5 x 2.1 power cord*1 (50cm)

-USB to DC2.1 power cord *1

Note:

1.Insufficient tuning may occur within 5W. So do not try tobe lower than 5W.

2.Recommended maximum power while tuning not above30 watts.(after tuning you can set 100 watts and work on this power，Otherwise it will burn easily)

3. You need to use 9-12V for theATU-100 to start. If you use a mobile power supply or a computer USB port tooutput power, you cannot start the ATU-100 because their voltage is too low.