1. Logo on the box: Qi Jun reading lights are generally marked with the difference between the front and back, which can be determined by looking at the logo on the box.
2.USB interface shape: The front and back of Qi Jun reading lamp can be distinguished by the shape of USB interface. The USB interface of the positive machine is generally square, and the negative machine is round.
3. Lamp head identification: The lamp head of Qi Jun reading lamp is usually marked with the distinction between the positive and negative machines, which can be determined by looking at the identification on the lamp head.
In a word, the above three aspects can be used to distinguish the front and back of Qi Jun reading lamp, and you can choose the corresponding distinguishing method according to your own products.
In addition to the above distinction, we can also take the following practical solutions and countermeasures:
1. Contact customer service: If you are still not sure whether the Qi Jun reading light in your hand is positive or negative, you can contact the customer service staff in Qi Jun for consultation, and they will provide you with professional answers.
2. Refer to the instruction manual: Qi Jun reading lamps usually have corresponding marks and instructions. You can determine whether the product in your hand is positive or negative by reading the instructions.
3. Online search: If you still have questions, you can search relevant information online, and other users may share similar problems and solutions.
In a word, it is very important to accurately distinguish the front and back of Qi Jun reading lamp, which can avoid unnecessary troubles and losses.