The KL08RF has 8 control zones, each with connections for up to 3 heating zones (actuators). The pump logic and boilers logic, a connection for Dew point sensor and the C/O input for automatic switching from heating to cooling are standard. FEATURES 8 zones with 3 actuators per zone Push-in cable connections with strain relief Volt free pump and boiler switching LED status indication Separate in-port for night setback signal Works with NO and NC actuators External clock contact Includes coordinator or ZigBee wireless for Smart Home App integration Zigbee 2.4 GHz 5 year warranty Power Supply: 230V Switching current (Max): 5A Output: 230V Size (mm): 353 x 85 x 65.