The effectiveness varies greatly depending on the size and content of the text. It's selling well to those who understand the difference. Anonymous shipping is available for an additional 150 yen, so please comment. Excellent deterrent effect against road rage (aggressive driving). Durability has been improved with the Ver UP. We ship the stickers so they won't be folded, so there are no complaints. This sticker is highly effective in deterring following vehicles by making them aware that you are also recording the rear! It's best not to engage with reckless drivers. Those who approach even when they see this sticker while driving are likely to do the same to a police car. It's a retroreflective material, so it reflects light like road signs when illuminated at night. The description "Front and rear recording in progress 360° drive recorder equipped" is even more effective than "Drive recorder in operation" or "Rear recording in progress." Size: 180mm x 50mm, a size that is moderately noticeable. Please refer to image 2. ・Can be applied to the rear window ・Durability is over 2 years with normal use ・No problem with car washes ・Rounded corners that are difficult to peel off ・Exclusive product made to order by a specialized retroreflective material factory Uses retroreflective film made by 3M, with excellent reflective performance and durability. With excellent deterrent effects, vehicles approaching from the rear at stoplights or while driving will almost always become more docile or increase their following distance. It's a sticker that is noticeable with large text during the day and reflects light when illuminated at night. The effect does not change depending on whether or not you have a drive recorder. Apply it to the rear window or body of the car at room temperature after thoroughly removing dust and oil. We ship on weekends, but please understand that shipping may be delayed to weekdays at worst. We try to ship as quickly as possible. ------The following are the real voices of customers who have made repeat purchases. My colleagues and friends at work compliment me a lot! They ask me where I bought it, so I recommend it without permission (sorry!). Drive recorder stickers are often small, hard to see even when applied, and difficult to see at night, so I'm really happy with this perfect product♪ As a female driver, I often get tailgated or looked down upon, but that hasn't happened since I applied this. Thank you very much♪