MDPB-H9 is a cassette product based on ultrasonic mixing technology to prevent mobile phone recording. When the mobile phone is placed into the device, its recording function cannot normally record the actual sound, and it cannot restore the real sound. Other mobile phone apps can not record normally even if they obtain the use of the microphone, so as to protect personal privacy.

Anti-app recording: APP software can not record normally even if the microphone is obtained;

Wireless charging: Put the phone into the recording shield box, the power indicator turns blue, and the phone will be automatically charged wirelessly.

Call security: When the phone is in the shielding box, the call content will be covered by noise;

Good anti-recording effect: our self-developed FPGA-based ultrasonic noise algorithm can effectively interfere with mobile phone recording, and the anti-recording effect is at an advanced level, which can effectively prevent the mobile phone's own APP software recording and call recording, so as to ensure the security of information;

Function of many devices: we have tested iPhone, Huawei, millet, OPPO, VIVO, Samsung, Nubia, Meizu, nuts and other new and old models of mobile phones, interference effect is good;

Quiet guardian: The sound waves issued by the anti-recording device are only received by mobile phones, recording pens and other digital products, but the sound that people can not hear is not buzzing noise compared with other anti-recording devices, and the quiet guardian conversation environment is not easy to be detected.