Feature: 1. High Power: This voice recording blocker adopts 360° all around coverage interception, which can prevent cell phone recording, anti recorder recording, anti video recording, and ultrasonic low frequency interception range up to 8 meters. 2. Ultrasonic Low Frequency Interception: This voice recording blocker uses ultrasonic low frequency interception, which can be used to securely process voice information, high and low frequency sound source mixing processing, the entire bass microphone, without the other party realizing that the interception is carried out under the interception. The voice information cannot be recovered after the interception. 3. Strong Endurance: This voice recording blocker uses 9800mah high capacity battery, which can run for 2 to 4 hours, and can meet the needs of general business meetings, schools and other places, and the four indicator lights can be easily grasped by the power of the interceptor. 4. Wide Coverage: This voice recording blocker uses ultrasonic sound source, 66 transmitting heads, with stronger high power effect and wide coverage. 5. Wide Application: This voice recording blocker can be used in confidential meeting rooms, business negotiations, negotiation rooms, schools, hospitals, automobiles, research and development centers and other situations. Specification: Item Type: Voice Recording Blocker Model: F12 Material: ABS Battery Capacity: 9800mAh 12.6V Lithium Battery x 1 ( Shipped with Built In Battery ) Power: 20W Output Voltage: 15V 5A Charging Voltage: 15V 5A Interference Angle: 360° Range: Approx. 8m/26.2ft. Package List: 1 x Voice Recording Blocker 1 x Power Adapter 1 x Manual