I have a bontrager node 1 on the front and a Cateye Strada double wireless on the rear of my tandem.
I'm not fond of the bontrager node 1 because it has problems with speed sensor in my case.
I should have done more research on the cateye because it only has 1m transmission.
the best solution that I know works is either the Cateye V3 or V2C wireless. Both do cadence and speed at the least and can share sensor. It also has a 5 m range.
Here is what the tech at Cateye told me.
Hi Jon
You can use two V3 or V2c model computer head unit components (one on each handlebar) with both head units synched up to one single V3/V2c speed/cadence sensor on the rear (chainstay)
Alternatively, you can use a combination of two products, either a wireless speed/cadence model (V3, V2c or Strada Double Wireless) on the rear and a wired speed model (Strada or Enduro 8) up front (on the fork) OR a combination of our wired speed/cadence model (Strada Cadence) on the rear and a wireless speed model (Adventure, Commuter, Strada Wireless, Urban Wireless, Micro Wireless or Vectra Wireless) or wired speed model (Strada or Enduro 8) up front.