1.Product Name: Anti-recordering equipment.2.Working Principle: Ultrasound interference.3. Remote Controlling: Comes with a wireless sensor remote controller, which can realize remote control of device switches and operations.4. Function: Protect your privacy and prevent eavesdropping.5. Other Function: Working as power bank(6000mAh ).6.Application Scenarios: Company metting, Business interview, Personal communication ,Confidential conversation and so on.Note:Only valid for Android phones.Due to different batches, the appearance and color of the product , but it does not affect the useColour:blackMaterial:plasticPackage Contents:1 x DetectorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.