Hi @Thalassa, welcome to the forum! 
This post isn’t particularly informative, which makes it hard for people to know if it’s worth getting in contact with you. If possible, could you please provide:
- critical technical specifications
- maximum power input requirement
- maximum power/current output capacity
- ideally both burst and continuous, if they’re different
- tether type (e.g. ethernet, two-wire communication (for use with Fathom-X?), etc)
- preferably some dimensions and weights/buoyancies
- what needs to be at the surface?
- what needs to be mounted on the ROV?
- tether diameter and buoyancy, and maximum length
- main locations you can (or cannot) ship to
- an indication of the price
- perhaps a rough range, accounting for different tether setups and/or different shipping locations
- one or more photos of the product / intended setup