Check whether the positive and negative poles of the battery are placed at the battery of the recording pen. If it is determined that it is placed correctly, check whether the battery is powered normally. If the power supply is not normal, please replace the battery. If the keyboard is locked, it can be solved by unlocking the keyboard and turning it on.

Philips brand originated in the Netherlands, and Philips recording pens have been serving the public with the concept of "capturing at will and enjoying the original sound". At present, the product line includes ultra-clear recording, music recording, ultra-long recording, conference recording, hospital speech recording and other fields, and strives to meet the recording needs of consumers and industries.