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by: Luciferrticle Source:and gizmos/article 3184. shtmlOf the thirteen Verizon Android phones the The HTC ThunderBolt is currently their premier phone. Other popular Verizon Androids are the Motorola's Droid 2 and the HTC Droid Incredible 2. However, these two phones don't sport the 4G connectivity, while the ThunderBolt does. From a physical point of view the ThunderBolt is fairly heavy 6. 4 ounces and large 4.

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You can't look in on a live video stream because the unit goes into hibernation when nobody's around. Video and Audio QualityWhen someone calls at your door, the video doorbell is only as good as the video and audio in the call. For video, we used a video test chart to evaluate clarity in daytime and nighttime conditions, giving scores based on which portions of the chart were easy to read. Every unit we tested produced great results, though the Ring Doorbell Pro had the best video quality overall. To a lesser extent, we also examined effective field of view and whether the video filled the screen. For example, the video doorbells from Ring each have a wide field of view, but the video has a fish eye effect that doesn't fill the whole screen and distorts the image around the edge. While it's not a huge problem for most people, some users, including us, might prefer fullscreen video. For audio quality, we gave pass/fail scores based on how clear and loud a call was on the mobile app as well as the built in speaker on each unit. Although there were small differences in audio quality, we found each unit sufficient for brief conversations with someone at the door. Ease of InstallationMore than anything else, easy installation relies on what comes in the box with the smart doorbell. We gave higher scores to products that come with printed instructions, screwdrivers, masonry drill bits, levels, battery chargers and extra parts where applicable.

 

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A decentralized IP security camera has a built in recording function. A centralized IP security camera needs a NVR network video recorder program. The NVR program records images that are stored in a digital storage device. The digital storage device may be a SD memory card or a USB flash drive. A disk drive may also be a digital storage device. Professional grade Security CameraThe professional grade security camera has a detachable lens.