[Audio Compatible] xmartO Wireless Security Camera System 4CH 1080p HD NVR with 4pcs 960p HD Indoor/Outdoor WiFi Cameras and 1TB HDD, Plug and Play, Easy Remote View & Playback, 80ft IR Night Vision [1000ft Long Range WiFi] Tested hundreds of times ON OPEN GROUND, the cameras work consistently while they are 1000ft away from the NVR receiver. The xmartO Dream Liner camera WiFi Relay tech. extends the range to 2-3 times that far again. Comparing to wired systems, this saves you not only thousands feet of cables, but also thousands bucks to get cameras cabled. [Plug and Play with Auto-Pair Tech] Auto-Pair means NVR finds cameras automatically when powered. No operation needed on any device, just plug them into power and you get the cameras' images and the NVR to record automatically. It's that easy, easy for everyone. [Comes with Built-in WiFi Router] The NVR receiver has its own WiFi router in. The cameras' HD video streams use that exclusive router instead of your home router. That keeps your network unaffected. [See and Replay from Anywhere Anytime, with No Monthly Fee] With the free xmartO Wallpixel App, you can setup your system on mobile in just minutes. The 1TB HDD loop records around past 30 days, of which you can view and playback from anywhere anytime. Under motion recording mode, that could be past 60 days or even more. [960p 1.3MP HD Images with Audio] 1.3 million pixels equal the pixels of an HD 720p camera + a 650TVL wired camera. That delivers crystal clear HD images day and night. With an audio jack on each camera and HDMI + 3.5" audio out on NVR, you can add microphones to cameras to hear voice on TV, speaker and phone. [IR Night Vision] With 3 professional IR LEDs Array in each camera, the system lets you capture clear image even in pure darkness. [IP66 Weather-resistant Housing] All the cameras are IP66 weather-resistant. With well-built quality and proper size, the cameras were designed to be mounted in almost any environment. [Constant Power Required for 24*7 Constant Security] With the WiFi video transmission, the system saves thousands feet of cables & cabling. As a full-time & full capability security system, cameras need constant power from nearby outlets within 10ft, or with power extension cables up to 30ft more. [1 Year Warranty & Lifetime Tech Support] xmartO keeps improving the system with new NVR firmwares and new Apps. We keep bring in new accessories such as a Pan & Tilt camera for upgrade. Reach us at support@xmarto.com if you need any assistance. Wired cameras are doomed to be mounted only 60-100ft away from the DVR. The 12V low-voltage power cannot avoid power &amp; signal loss when coaxial/ Cat5 cables are longer than that. Running 4 or more long cables from different cameras to one single DVR is not only expensive, but also destructive to the place. The maximum line-of-sight range of 300 feet is reduced by each wall, ceiling, or other major obstruction between the camera and base station. Battery cameras are not full-time security cameras. They work only when there are activities within 20ft or so. Battery changing is another concern especially when users are away from home. On open ground, you get about 1000ft mounting range immediately while plugged in. With xmartO Dream Liner WiFi Relay technology inside, you can set closer cameras as Wi-Fi repeaters to boost the WiFi range to 2 - 3 times that far. Likewise, the WiFi range is reduced by each wall, ceiling, or other major obstruction between the camera and NVR base. Featuring Auto-Pair technology, you only need to plug camera system to power and the NVR to a TV/ monitor. They will start to show and record videos. Unlike some multiple-camera systems, the xmartO cameras do not connect to your home WiFi. They connect to the built-in WiFi to avoid messing up your network. The NVR then join your home network as an Internet device, like a desktop PC. With the stand-alone WiFi router, the camera system works even if there is no existed network. Download and install App Scan the QR code on screen, or input the Cloud ID Each camera delivers 960p 1.3 mega-pixel crystal clear videos. With audio jack on the tail of each camera, you can add microphones to get audio embedded to videos. The NVR base has both HDMI &amp; 3.5&#034; audio ports to output audio to TVs or speakers. Audio can be played along with videos on mobiles. Cameras are well-built with waterproof and proper-sized. Designed to be mounted anywhere indoor or out. With 3 professional LEDs array in each camera, it sees up to 80ft away in pure darkness. To help you staying alert of your place, especially when you are away, App pushes notifications to your mobile, or send you emails with snapshots  when activities detected. With 1TB hard disk in, the NVR records past around 30 days of all 4 cameras 24x7. With support of  maximum 6TB HDD, the system holds up to past 180 days. The record can be accessed, clipped and shared from anywhere anytime, with absolutely 0 monthly fee. Being wireless, the NVR base can be hid to avoid stealing. To work 24x7 with full capabilities, cameras need to be plugged to power outlets within 10ft, or within 25ft with a extension cable. This one-time job avoids dead cameras and frequent battery changing &amp; costs.