Absolutely! Our helmet Bluetooth headset is equipped with advanced triple noise cancellation technology, including a DSP chip, CVC technology, and a noise-proof microphone. This ensures you experience crystal-clear audio quality, even when cruising at high speeds. 

1 camera, 1~2 lenses, cables, small accessories; for example, Sony A7 kit (24-70mm), Sony A6400 kit (18-135mm), Nikon Z50 kit (16-50mm f/3.5-6.3, 50-250mm f/4.5-6.3), Fujifilm X-A7 kit (15-45mm), Fujifilm X-T20 kit (XC 15-45mm), Canon EOS M200 kit (EF-M 15-45mm), Canon EOS R5 kit (RF 100-500mm); power bank, ipad mini, data cable, mobile phone, etc. Lens that can be installed: diameter ≤12cm, height ≤26cm 

About 4m/13ft. 

Yes it does but you have to turn it ON manually from settings 

I've pretty much only used these batteries when doing video work, and haven't gotten any hum. Hope this helps.