Your best option would be the Fukuda FRE-203XR Kit.
The Fukuda FRE-203XR is a fully self-levelling red beam rotary laser which levels on the horizontal, vertically, does 90° squaring and dual grade. It is accurate to ±2.8 mm at 30 m, range of 500m, has an IP rating of IP66 (Dust tight / Protected against powerful jets of water) and a 3-year warranty. It is rechargeable but can also run on alkaline batteries.
https://www.laser-level.co.uk/fukuda-fre-203xr-laser-kit.html
At the time of writing the cost is £589.19 inc vat
The kit can also be further upgraded to have the FRD800R Detector which has the mm/inch display. This has a large pickup window and the mm / inch scale to see the elevation or drop on the display e.g 10mm - 8mm - 5mm - 2mm - LEVEL.
At the time of writing the cost of the upgrade kit is £697.18 inc vat.
The direct link for this configuration is:
https://www.laser-level.co.uk/fukuda-fre-203xr-laser-kit.html?config=238-571
Delivery is free by DPD if ordered by 3:45pm each working day, insured and tracked to your door.
If you would like to order, simply add all the products to the basket and checkout in the normal way. Payment is then via credit/debit card / Paypal or BACS. Again all via the website.