Features DUAL PURPOSES --- This device is both an voice recording blocker and a portable mobile power supply, making it convenient and practical. VOICE BLOCKING --- Unique ultrasonic interception, intercept voice information, mixes high and low frequency audio source, and can not be recovered. BUILT IN BATTERY --- The recording interceptor has a built in 4000mAH battery, ensuring long term use, making it easy to use anytime and anywhere. REMOTE CONTROL --- The recording interceptor supports wireless remote control, with a distance of 1‑50 meters and a 300 degree anti recording direction. APPLICABLE SCENE --- This anti recording power supply is suitable for business interview, individual comm, confidential conversation, and other scenarios. Specification: Item Type: Voice Recording Blocker Model: F10 Remote Control Battery: 1 x 18mAh Alkaline Battery (built in battery) Blocker Battery Capacity: 1 x 4000mAH 3.6V Battery (built in battery) Charging Voltage: 5V 1000mA Output Voltage: 5V 1000mA Standby Current: 10mA Shutdown Current: 60uA Anti Recording Sound Pressure: 120DB/30cm (maximum) Anti Recording Direction: 300 Degree (maximum) Remote Control Method: 433 Wireless Remote Control, Distance 1-50 Meter / 3.3-164ft Package List:1 x Anti Recording Power Supply1 x USB Cable1 x Remote Control1 x User Manual Note:Do not use other plugs higher than 110V specification. Package List 1 x Anti Recording Power Supply 1 x USB Cable 1 x Remote Control 1 x User Manual