brand new and high quality Length: 42cm/15.8inch Features: for Ideal add-on to your CCTV DVR System. Simply plug into your DVR Audio Channel using a Phono Cable. It requires a 12V power supply It's used both Indoor and Outdoor (Outdoor with suitable for protection from the rain) 2 Connectors: One is a phono connector for audio while the other one is a for DC power connector Can be fitted on ceilings, walls, in suspended ceilings, under roofs, under soffits, cashier/ till desk at your business, behind a sofa inside a living room, etc Connects directly to you DVR, no need for an amplifier Power Supply Required: 12V for DC (Not included) Current Consumption: 200mA Audio Range: up to 20-30 metres (omni-directional) Frequency Range: 10-2000kHz Color: As Shown Quantity:1 Pc (Microphone ONLY ,other things not contained) Note: Size for manual measurement, there may be a 0 to 2 for cm error, belongs to the normal phenomenon. And due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!