Product Comparison: Amcrest ProHD (IP3M-943B) vs Lorex LNB4321B

Advertiser Disclosure

This site is a free online resource that strives to offer helpful content and comparison features to its visitors. Please be advised that the operator of this site accepts advertising compensation from certain companies that appear on the site, and such compensation impacts the location and order in which the companies (and/or their products) are presented, and in some cases may also impact the scoring that is assigned to them. The scoring that appears on this site is determined by the site operator in its sole discretion, and should NOT be relied upon for accuracy purposes. In fact, Company/product listings on this page DO NOT imply endorsement by the site operator. Except as expressly set forth in our Terms of Use, all representations and warranties regarding the information presented on this page are disclaimed. The information which appears on this site is subject to change at any time. More info

General Specifications
ProHD (IP3M-943B)
About the Product
The Amcrest ProHD 3MP Wi-Fi bullet video camera helps you stay in touch with what you love anytime, anywhere. With its quick mobile setup process, you will have secure access to your camera's video stream in no time. Stream live and playback recorded video of your home, your kids, your pets, or your business on the go with the Amcrest View app.
The LNB4421 network bullet security camera will bring a whole new level of detail and clarity to your home or business surveillance needs. This Super HD security camera is capable of recording double the resolution of 1080p thanks to the 4-megapixel (MP) image sensor at its core.
Key Specs
Field Of View
100 °
90 °
Number Of Cameras
Number Of Channels
Motion Sensor
Ambient Light Sensor
Storage Type
SD card
Hard drive
What customers say about "Key Specs"
Amcrest ProHD (IP3M-943B) Wireless Outdoor Security Camera
  • Nice viewing angle. Unsure what it is, as when I purchased it the description stated it was 90 degrees, now it states its 100.
  • Resolution. I run 2 cams, and get just what I need with 2000 kbs / 1080p on both, through wi-fi.
  • Amazing resolution, great FOV. Easy in setting up, It took me all of 30minutes from open box to viewing on my computer. Onboard SD card storage was a must and it delivers.
  • High resolution. Much higher than my Lorex cameras. Clear, saturated color picture.
  • Bitrate drops dramatically at night on any VBR setting - below 100kbs, resulting in a very poor video quality. Changing it to CBR fixed the issue.
  • Having 2k resolution is great but when you are limited to 64gb of SDcard, you're constrained to about 4 hours of play back. 128gb should be minimum and if possible I would pay the extra for a 256gb if possible.
Lorex LNB4321B Bullet Camera with Color Night Vision
  • Very good picture quality. Love the 90° wide angle view, covers more ground than most cameras. Case is very solidly built.
  • Good quality video and easily reads license plates up to about 75 feet in daylight. Lorex has plans for an 8MP camera in this same style/size package and I hope to try one of those as well.
  • Excellent POE cable IP camera if used with a POE switch. Image quality is excellent, and can digitally zoom
  • The 4MP is very clear and the has more color at night. Very pleased with this.
  • Love the quality of the picture! Works great! People always ask what cameras do I use since it looks so nice, I say Lorex!
Size & Weight
2.75 in.
2.8 in.
2.75 in.
2.8 in.
6.5 in.
6.3 in.
16 oz.
14.4 oz.
What customers say about "Size & Weight"
Amcrest ProHD (IP3M-943B) Wireless Outdoor Security Camera
  • The camera is compact and well made.
  • Good Camera, nice small size. Easy to install.
  • The perfect size, quality, and features for this price point. I love it.
  • I like the small size of the camera. Picture looks good too. Durability is yet to be seen because I have only had them for short time.
Lorex LNB4321B Bullet Camera with Color Night Vision
  • Fairly small form factor. Easy to use.
  • Small, light and cute. The size and weight of the camera, allows for many mounting and placement options.
  • Good compact small camera size makes it easy to hide it.
  • Compact footprint, good user interface, good app interface, decent resolution.
Security Camera
IP camera
Remote Monitoring
Day/Night Mode
Night Vision
Night Vision Distance
98 feet
5.0 feet
Auto-On Detection
Streaming Video
OS Compatibility
iOS, Android, Windows, Mac
Mac, Windows
Magnificent Ultra High Definition 3-Megapixel, Embedded microSD card slot that supports up to 64GB, Stay in Touch with Intelligent Motion Alerts, Cloud Recording and Playback with Free Live Viewing and 4 Hours of Free Storage via AmcrestCloud, IP67 heavy-duty metal weatherproof cameras, See in the dark up to 98 feet
High definition 4mp image sensor delivers double the detail of 1080p, True High Dynamic Range, Color Night Vision, Ceiling / wall mountable
What customers say about "Features"
Amcrest ProHD (IP3M-943B) Wireless Outdoor Security Camera
  • App support for ios is lovely. AI integration aka Alexa is the future of the system.
  • Motion sensors/capture functionally works! (Picks up people, birds, squirrels, fly's, light, and wind).
  • Instant motion alert to email and phone is key. Nice feature.
  • Good camera controls for brightness, gain, etc. Works well in low light or if bright and sunny. My porch is covered, even in the shade of the porch on a sunny day you can easily see who or what has set off the motion detect.
  • No glossary on app. Alphabetical list for every tool/option would improved the learning curve.
  • The android phone app crashes now and then, but not a deal breaker for sure. It isn't very intuitive to use.
Lorex LNB4321B Bullet Camera with Color Night Vision
  • You just have to plug the camera into your network, and identify the IP address based of of the MAC address. This was my first test IP camera, and I wll be buying more of this same model.
  • I still use 2K for inside the home (not distance viewing) and for some closer outdoor viewing like my front door area and the back patio. Otherwise 4K all the way.
  • Good value for the money. Works great. Small in size you really dont see it unless you are looking for it. Will buy more in the future as needs increase.
  • No color at night without LOTS of background light. Day light is good..
  • Easy to hook up and works to my satisfaction. Technical support area is excellent. I would recommed.
Warranty / Certifications
Manufacturer Warranty
1 year(s)
2 year(s)
Other Information

Price History

Other reviews