Salus Controls Salus Quantum Wireless Thermostat & Receiver - WQ610RF

It has a long battery life, thanks to its state of the art built in rechargeable lithium battery. All WQ610RF thermostats include a pre-paired receiver and are linked via Zigbee 2.4 GHz communication. With innovation, science and quality in one, the new Quantum WQ610RF thermostat is feature packed to ensure that your clients have perfect control over their heating system. Power supply thermostat - LI-ION Battery Scale - 5°C ~ 35°C Thermostat Dimensions - 86mm x 86mm x 11mm (HxWxD) RF Frequency - 2.4 Ghz (up to 30m range)