Audio Recording Surveillance Sound Monitor Pickup Device - Silver (6~12V)
Color: Silver - Material: Aluminum alloy - Voltage: 6~12V - Frequency range: 200~10KHz - Frequency response: 2.5dB - Monitor area: 5~150 square meter - Cable length: 11cm - Suitable for different types of supervised listening environment such as bank prison examination place - Comes with English manual