These wireless conversion boxes are used to convert USB cameras' video to wireless signals, which can be picked up by a smartphone (iPhone, Android phone) or tablet (iPad, Android tablet) and convert back to video by appropriate APP. Normally an APP can be downloaded free from Apple app store, Google Play store, or other websites. 
  • W01 (VA-B2) wifi box does not have built-in battery. APP is "AirBox": preview, pictures and videos
  • W02 wifi box has 1000mAh rechargeable battery. APP is "supereyes": preview, picture and videos
  • W03 wifi box has 2000mAh rechargeable lithium battery. APP is "WiFi View": preview, picture and video
  • IMB-07 wifi box has 2600mAh battery, built-in stand for phone and tablet. APP is "UmLink": measurement functions and video camera features
* WiFi conversion boxes need to be optimized for specific USB camera. Some of them maybe not compatible with your specific USB video camera device.  
Comparison of several usb-to-wifi conversion boxes
Models
App Name
Battery Capacity
Picture & Video
Measurement
W01 / VA-B2 
airbox - Vividia 
no battery
Yes
No
W02
supereyes
1000 mAh
Yes
No
W03A
WiFi Image
no battery
Yes
No
W03B
WiFi Image
2000 mAh
Yes
No
IMB-07
UmLink
2600 mAh
Yes
Yes