Features: Car door opening reminder voice broadcast hint device to avoid driving door causing traffic accidents LED automatic sensor reminder light car door collision alert, open the door before the voice broadcast reminder, to protection themselves and other pedestrians security With the function of spatial sensing, open the door will be bright, breathing light prompts Compact does not take up space, easy to directly affixed to the door handle can be Low power consumption, high-capacity battery, charging once enough to use for a long time Specification: Charging Duration: 30min Material: ABS Package Content: 1/2Pcs x Door Alarms(as your choice) Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 2. Please allow 1-3cm measuring deviation due to manual measurement. ( 1 inch = 2.54 cm )