Features: Determine whether the driver is fatigued or inattentive. Once it detects that the driver is tired or distracted driving, it will immediately send an alarm signal to remind the driver. No matter what the situation is (day, night, when the driver wears glasses, it is recommended not to wear sunglasses), it can accurately detect the driver's fatigue state, and can send reminders and alarms to the driver in real time to ensure the safety of the driver. Specifications: Charger input: DC 12V/24V Charger output: 5V, 1.5A Minimum working voltage, current: 4.75V, 240mA Maximum working voltage, current: 5.25V, 500mA Working voltage, current: 5V, 320mA Function: Alerts promptly when the driver is fatigued Alerts when driving distracted (looking around) Alarm response time: 1-2 seconds after closing your eyes Detection angle: 60 degrees Interface: USB Working temperature: -20~60 Storage temperature: -20~80 Detection distance: 45-65 cm (5cm) Languages: Chinese, English, Russian, Japanese, Korean (multiple languages are available, but only one can be selected) The package: 1*Host 1*Bracket 1*Cigarette lighter 1*Manual Precautions: 1. This product is currently only suitable for private cars, not for trucks and large cars. 2. When wearing sunglasses, the driver can also use this device. When using this device, it is recommended not to wear sunglasses. 3. This product is only for safe driving. There may be false positives or under-reports. Please don't rely solely on it or perform extreme tests. Note: 1.Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the picture. 2.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Return Policy All of our items come with a 30-day free return policy. If you need to return, please contact us, let us know the detailed problem and send us some pictures for confirmation. We reserve the right to refuse any returns for objective reasons. Shipping Policy All of our items are shipped free with tracking numbers. Orders will be shipped within 3 working days upon receipt of payment. Most orders will be shipped within 1 working day. In most cases, shipping takes 8-12 working days.