The car door safety reminder is a reliable and sensitive car accessory that ensures safe driving. With its precise judgment and real-time monitoring, it the security of your vehicle. When you want to get out of the car and open the door, the alarm will be triggered when you hold the handle, and the safety reminder will send out a language prompt. Features -Color:Black -Material:ABS -Size:5.90X2.70X1.00cm/2.32X1.06X0.39in -Voltage: 5V -Charging time: 30 mins -Power supply: USB charging -Note: verbal prompt -The main function of this car door open reminder is to remind the driver and also to pay attention to rear safety when of the car and opening the door to avoid traffic accidents. -Safe on the road with our precision sensing function that accurately detects the rear safety. -Our car door open reminder is designed to be easy to install and won't take up any valuable space in your vehicle. -Using sturdy materials, car door safety verbal reminder can support long time using. -Easy to use, the car door open warning reminder is a good accessory for any drivers. Package list: 1 Door Opening Reminder