Feature: 1. Ultra Sound Wave Silent Interference: Voice recording blocker can interfere with voice information from any device through high and low frequency sound source mixing, making the interfered voice information unrecoverable. 2. Anti Recording Mobile Device: It serves as both an anti recording device and a portable power bank. Ready to use upon power on, with 3 output directions, 2 modes, and a shielding angle of 300 degrees. 3. Anti Eavesdropping and Anti Recording: Our smart recording jammer can prevent phone recording, voice recorder recording, surveillance recording, and protect your privacy during conversations. 4. Remote Control: Comes with a wireless remote control for remote operation and device on off switching, with a control range of 1‑20 meters. 5. Wide Application: The voice recording jammer is suitable for a variety of scenarios, such as conference discussions, business interviews and confidential conversations. Specification: Item Type: Voice Recording Blocker Material: Plastic Weight: Approx. 432g / 15.2oz Battery Type: Lithium Battery 8000mAh (Shipped with) Anti Recording Sound Pressure: 120dB/30cm (Max) Anti Recording Direction: 300 Degrees (Max) Remote Control Method: 433 Wireless Remote Control, Distance 1-20 Meters Remote Control Battery: Lithium battery160mAh (Shipped with). Package List: 1 x Voice Recording Blocker1 x USB Cable1 x Instruction Manual1 x Remote Control