- Digital Display Model Product Features: The top choice for beginners; excellent value for money Heating Method: Mechanical heating Control System: Rear switch Temperature Range: 30–100°C Safety Features: Float valve to prevent dry heating Suitable Water Source: Tap water - Temperature-Adjustable Model Product Features: Freely adjustable temperature; energy-efficient and user-friendly Heating Method: Step-heating Control System: Microcomputer control Temperature Control: 30–100°C Safety Protection: Water level indicator to prevent dry heating Suitable Water Source: Tap water - Timer Model Product Features: Smart timer, energy-saving and hassle-free Heating Method: Step heating Control System: Microcomputer control Temperature Control: 30–100°C Safety Protection: Water level indicator to prevent dry heating Suitable Water Source: Tap water - Dual-Water-Source Model Product Features: Color screen display, multiple water sources Heating Method: Step-by-step heating Control System: Microcomputer control Temperature Range: 30–100°C Safety Protection: Water level indicator to prevent dry heating Suitable Water Sources: Tap water/bottled water