This is a programmable countdown timer, the longest can be set to 30 minutes, the timing is very accurate. The large time scale can quickly set the time and the reading is clear. With high-quality plastic shell, internal high-conductivity copper material, this timer switch has excellent performance, environmental protection, safety, sturdiness and durability, and reliable use. This smart countdown timer is universal, wall-mounted and very convenient to install. And the timing range can be controlled by the switch button, which is very easy to adjust Rated voltage: AC 220V 50Hz .Maximum current: 15A The timer switch can be widely used to control water pumps and household appliances, such as water dispensers, water heaters, air conditioners, electric fans, heaters, routers, mobile phone chargers, electric bicycles, etc.