A Polystar 15L water heater typically features a 15-liter capacity, a vertical design for space-saving installation, a durable Incoloy heating element, and a corrosion-resistant stainless steel inner tank. It includes essential safety features like overheat protection, a thermal cut-off, and a pressure relief valve. The unit also has high-density polyurethane insulation for heat retention, a thermostat for temperature control, and a wall-mounted design for easy and secure setup.