This is the review of a tiny tuner, the MFJ-904H, it can handles up to 150 Watts, not 300W as mention in the video at 0:40, sorry for the confusion, the meter goes to 300 W. It covers 80-10 Meters, has tuner bypass switch and can tune nearly anything! Good for the shack and portable operation!
73 Pascal VA2PV
Source: QRZ News
Link: MFJ-904H Review – Compact Antenna Tuner, up to 150W from 80 to 10 Meters