Erwin Yes, it can be programmed with OpenGD77

Erwin 1): Turn off the device, Press P4+FUNC+POWER ON KEY (at the same time press 3 keys), then power on. 2): Rotate the channel knob to Choose to Mode menu 3) Press and hold PTT key on the external speaker mic. MODE no. Change to blue color, then rotate the channel knob to choose the frequency band you need. When you choose Mode 2,then you can use the full frequency. 136-174 MHz and 400-490MHz. 4)Turn off the device, then turn on again. Will be the new frequency band you setted.

Erwin Well, if you take a close look you can buy as an extra option either 7 or 3 remote ID's none of them will be supplied if you order the device only!

Erwin If you can read Chinese than you might be able to download the correct app and use it. Since the manual is all Chinese I was unable to use it the way described and download the app either.

Erwin Hello Clyde, the meter connects under the left hand side of the bottom of the FT-857 when looking towards the front of the Ft-857 (same side as the microphone exits)

Erwin LOL LOL If and only if you would take a closer look you would see for yourself ..... When you click on the various item's the price will change so it means you have to choose! what you want to order.

Erwin yes it absolutely is compatible, I even got just some filters marked with 3M

Erwin This screw is meant to be TIG welded on to tank where the transducer is supposed to be glued on. So you first weld the screw to the tank then apply some glue to the transducer and then you screw it on to the onwelded screw thigthly flush to the tank's bottom.