Dynasty Spas 0610-221066-363 Gecko in.ye5 Spa Control 4.0kW Flow Thru Heater is manufactured for Dynasty Spas by Gecko. Gecko Y series boasts impressive features and technology in reliable, safe, long lasting and user-friendly control systems designed to be easily installed, powered and connected to pumps and accessories of spas of all sizes and configurations. Like all other platforms of Gecko’s Y series, in.ye is compatible with a wide selection of keypads and auto-detects the selected keypad model at power up. With its new terminal block, onboard AMP connectors and an evolved cable strain relief system, it has never been easier to connect your accessories to a control box!