Description: This is a new type of sound monitor withhigh sensitivity, designed for TV monitoring, anti-theft alarm and varioussecurity systems. Mini and compact design allows you to install it in smalloffices or larger areas to cover almost any indoor environment. Features: This Sound Monitor for CCTV SecuritySystem. 100 Square Meters Wide Range: Designed forthe monitoring and recording applications within normal range, the widestmonitoring range can be up to 100 square meters. High sensitivity Sound Monitor: clearvoice, low noise, , applies to a variety of situations, such asfor bank, examination room, shopping malls and so on. Safe Use: Built-in reverse power protectivecircuit, low power expense, wide voltage range, safe and reliable to use. Easy Installation: Compact design, smallsize, plug and play. Casing is made of plastic material, easy toclean in daily use. Specifications: Color: White Power Supply: DC 6V-12V Working Current: 10mA Frequency Range: 300Hz ~ 5500Hz Frequency Response: 2.5 dB Monitoring Range: 10 ~ 100m2 Output Impedance: 600 Ω Output Voltage: 0 ~ 6V Size: Approx. 70 x 70 x 42mm / 2.7 x 2.7 x 1.7in Package Weight: 79g Package List: 1 x Audio Pickup Microphone Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.