Feature:1. Enhanced Sound Amplifier: By using the sound amplifier, you can effectively enhance and amplify sound, allowing you to hear subtle sounds more clearly.2. Microphone Audio Technology: With advanced microphone audio technology, this amplifier device is capable of capturing and amplifying ambient sound, enabling you to hear distant sounds, even through walls and doors.3. Multifunctional Tool: With through wall function, you can hear the sound inside the room without entering the room, perfect for daily security monitoring and home use.4. Easy to Use: This voice enhancer device is very simple to use, just connect the headset to the device and adjust the volume. Suitable for people of all ages.5. Durable Material: Sound amplifier device is made of durable and reliable material, high strength and wear resistant, having long service time.Specification:Item Type: Sound AmplifierMaterial: ABSBattery Type: Polymer Lithium BatteryBattery Model: 1254Battery Capacity: 68mAh(Shipped With Battery)Sensitivity: -60DdbMaximum Audio Magnification: 13000X 13000xPenetration: Water Pipe/Cement Pipe/Steel PipeAnswering Method: Earphone.Package List:1 xSound Amplifier1 x Data Cable1 x Earphone1 x Manual