★ Used for 1 year. This is a used item. The operation is normal. ★ This product has a simple setup, plugging into a cigarette lighter socket for power. - Model: DF-01-2in1 - Functions: Digital thermometer, voltmeter - Compatible voltage: 12V and 24V - Measurement range: Temperature range: -10℃ to +60℃ - Display: Digital display Thank you for viewing.