Secure C1727 2 Channel Smart Thermostat & Receiver & 8 Radbot 1 TRVs

8 Radbot1 TRVs with converters for different valve types (Requires two standard 1.5V AA alkaline batteries). Thermostat (connects directly to the boiler). One TRV clip has snapped, though it still attaches securely and works as intended.

eBay