?It must confuse you when you face various products among which you desire to get the best one. If you ask for my advice£¬ I strongly recommend you this 4 Channel 480TVL 24SMD LEDs 1/4" CMOS NTSC System Small DVR (US Standard). Made of durable material£¬ it can well serve you for quite a long time. Compact small design makes it look attractive and delicate£¬ so you can carry it to anywhere conveniently. It is great for recording videos and taking photos£¬ functional and reliable. All in all£¬ high resolution£¬ fine workmanship and easy operation£¬ it is worthy of each penny!                                    Features            Auto white balance and gain controlAdopt H.264 compression process and advanced techniqueSupport NTSC TV systemA sophisticated system guarantees the smooth and successful operation4-Channel real-time recording transmission and playbackEasy to install and operateAllow live display£¬ record£¬ playback£¬ backup£¬ control and network operation at the same timeHigh improved video quality for live£¬ recording£¬ and networkBuilt-in 24SMD LEDs£¬ providing you clear and legible views of videos or pictures                                                            Specifications            Camera        <br>TV System    NTSC    <br>Pixels    510(H) x 492(V)    <br>Image Device    1/4" CMOS    <br>Horizontal Definition    480TVL    <br>Minimum Illumination    0 Lux (IR ON)    <br>IR Distance    15m    <br>LED Quantity    24pcs    <br>Lens    3.6mm    <br>Power Adapter    DC 12V£¬ 500mA    <br>White Balance    Auto    <br>Auto Gain Control    Auto    <br>Electronic Shutter    1/60 ~ 1/100£¬000 sec    <br>Color    Black    <br>Dimensions    (5.91 x 1.97)" / (15 x 5)cm (L x Dia.)    <br>DVR        <br>Video Compression    H.264    <br>Video System    NTSC    <br>Operation System    Embedding Linux    <br>Video Input / Output    4 Channels BNC Input£¬ 1 Channel BNC Output    <br>Ohter Output    1 x VGA£¬ 1 x HDMI Output    <br>Audio Input / Output    1 Channel RCA Input£¬ 1 Channel RCA Output    <br>Network and Protocol    1 x RJ45£¬ 10/100M; Support TCP/IP£¬ PPPCE£¬ DCNS£¬ DHCP£¬ UPnP    <br>Display Resolution    D1(704x480)    <br>Recording Resolution    D1(704x576)£¬ HD1(704x240)£¬ CIF(352x240)    <br>Recording Frame Rate    D1@100fps£¬ HD1@100fps£¬ CIF@100fps    <br>Recording Backup    1/4 Channels playback    <br>Recording Mode    Manual£¬ Timer£¬ Motion Deteciton£¬ Remote    <br>Recording Backup    USB£¬ Moved Hark Disk£¬ USB Writer£¬ Network    <br>Network Transmission    4 Channels Real-time Network Transmission with QCIF Resolution    <br>Email Alarm    Send Pictures to the designated email    <br>Multiplex Operation    Live£¬ Display£¬ Playback£¬ Recording£¬ Backup£¬ Mobile phone Surveillance£¬ Network Simultaneously    <br>HDD    Support 1 STAT HDD£¬ Capacity to 2TB (HDD is not included)    <br>Mobile phone Surveillance    Support Windows£¬ Symbian£¬ iPhone£¬ Blackberry£¬ Android OS    <br>Multi-Language    Support    <br>PTZ Control    PELCO-D£¬ PELCO-P    <br>USB    2 x USB 2.0    <br>Remote Control    Support    <br>Power Supply    DC 12V£¬ 3A    <br>Dimensions    (8.46 x 10.04 x 1.77)" / (21.5 x 25.5 x 4.5)cm (L x W x H)    <br>Environmental        <br>Working Temperature    0¡æ-+55¡æ    <br>Working Humidity    10%-90%    <br>Total Weight    3958 g / 139.61 oz    <br>                                                            Package Includes            1 x 4 Channel DVR4 x Cameras3 x 20m Connecting Cables1 x Mouse1 x Remote Control2 x US Standard Power Adapter1 x CD Driver1 x Power Cable