У вашего броузера проблема в совместимости с HTML5
A test of the superb WLN KD-C1 a budget radio available to buy in the UK for £8.99 packing a full 2W of power on UHF, programmable with Baofeng type cable and bespoke software.
A link to Ringway Manchesters channel where he puts this radio and loads of others through some great test, please check him out and subscribe.
https://www.youtube.com/user/RINGWAYMANCHESTER
Link to the software on 409 shop
http://www.409shop.com/shop_displaynews.php?id=292&locate=3
Link to the driver software for your cable
http://www.miklor.com/COM/UV_GettingStarted.php
The Amazon seller I got my radios from (not the price has increased slightly) but they were UK stock.
https://www.amazon.co.uk/gp/product/B01J9F0E0C/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1