Reolink E321 3MP Indoor Pan-Tilt Wi-Fi Camera｜Budget 2K with 355° Panoramic Coverage

2304×1296 3MP@15fps｜f=4mm F2.0｜355°／90° Pan-Tilt｜12 m IR Night Vision｜512GB

Product Overview

The Reolink E321 is the entry-level model in Reolink’s indoor pan-tilt camera range: 3MP (2304×1296), a 1/3" sensor, 355° horizontal and 90° vertical pan-tilt coverage, with support for auto-tracking and up to 512GB microSD storage. Its key advantage is delivering broad coverage and essential functionality for indoor monitoring at a lower budget.

It offers an official resolution of 2304×1296 (3 megapixels) @15fps, with an f=4mm, F2.0 lens equipped with IR-cut. The field of view is 77° horizontally and 41° vertically, with 12 m IR night vision. The pan-tilt range is 355°/90°, and the manufacturer explicitly states that auto-tracking is supported.

Wireless connectivity supports IEEE 802.11ax/b/g/n and 2.4GHz only, with WPA/WPA2/WPA3 encryption. Storage supports up to 512GB microSD. The camera measures Φ73×114mm, weighs 167g, and operates from -10°C to 55°C.

Reolink E321 camera body and exterior (official image)

Six Key Highlights

Is 3MP Enough?

2304×1296 is 2K-class resolution, with twice as many pixels as 1080p. For viewing people, pets, or door activity indoors, 3MP is sufficient for identification at a distance of 3-5 metres. If you need to see small objects on a desk or fine details at a distance, the 5MP E331 would be more suitable.

The 77° horizontal and 41° vertical field of view is relatively narrow, resulting in a larger subject at the same distance. Combined with the 355° pan range, you can cover the entire room by rotating the camera instead of forcing everything into an ultra-wide-angle view.

• 2304×1296 3MP @15fps
• Field of View 77°／41°
• f=4mm F2.0 with IR-cut

355°／90° Pan-Tilt with Auto-Tracking

The pan-tilt range is 355° horizontally and 90° vertically. When installed in a corner, point the 5° blind spot toward the wall to achieve virtually complete coverage. The 90° vertical range lets you view the floor, beside the bed, and pet cages.

The manufacturer explicitly states that Auto-Tracking is supported. For indoor use, tracking is helpful when the subject moves, such as a pet. If you are monitoring a fixed area, it is recommended to turn it off to prevent the camera view from constantly rotating.

• 355°／90° Pan-Tilt
• Supports Auto-Tracking
• Point the blind spot toward the wall

12 m IR Night Vision and Night-time Images

12 m IR night vision is more than sufficient for indoor rooms with a depth of 3-5 metres. Night-time footage is in black and white, and there is no spotlight, so full-colour night vision is not available.

To improve night-time image clarity, positioning is more important than the specifications: do not point the camera at a window, as the outside will be dark and the glass may reflect light; also avoid placing it too close to a corner, as IR light reflected from a white wall may cause overexposure.

• 12 m IR Night Vision
• Black-and-white night-time footage with no spotlight
• Avoid pointing at windows or placing it too close to walls to prevent reflections

Practical Impact of 2.4GHz Only

Wireless connectivity supports 802.11ax/b/g/n but operates on 2.4GHz only. The advantages are better wall penetration and broad compatibility; the downside is that 2.4GHz networks are extremely congested in Hong Kong homes, which may cause delays during busy periods.

If your home already has many devices using 2.4GHz, such as smart lights, smart plugs, or a doorbell, it is recommended to place the camera near the router, or switch to the 5GHz-compatible E331.

• Supports 2.4GHz Only
• Better wall penetration but more congested channels
• Recommended to install near the router

512GB Storage and Routine Maintenance

Supports up to 512GB microSD. Indoor activations are usually infrequent, so 512GB can store footage for a long time. We recommend using a high-endurance card designed for surveillance and regularly checking in the App that recording is working properly.

Maintenance only involves two things: cleaning the lens (dust can make infrared footage appear washed out) and checking that the power cable is not loose. The indoor camera has no waterproofing concerns.

• microSD up to 512GB
• Triggered recording as the main mode
• Clean the lens regularly

Size, Power Supply and Placement

Body Φ73×114mm, weight 167g, operating temperature -10°C to 55°C, humidity 20%-85%. Fully sufficient for indoor use; the official specifications do not state an IP waterproof rating, so do not install it in a bathroom.

The official spec sheet does not list power specifications, so we do not fill them in on your behalf; indoor pan-tilt cameras generally use USB power, so make sure there is a nearby socket when choosing a placement, and allow for sufficient cable length.

• Φ73×114mm／167g
• Not waterproof; do not install in a bathroom
• A nearby socket is required

What's in the Box

The following is the contents of the Hong Kong authorized-market packaging; actual accessories may vary by shipment batch. If you have any questions, please check with us before placing your order.

• The official page does not disclose the in-box contents and power specifications item by item. Indoor cameras generally include the main unit, power cable, and mounting base; if you need to confirm the adapter specifications or base style, please contact us before placing your order.
• Package contents are subject to Reolink's official shipping configuration; the official product page does not disclose the in-box contents item by item, and our store does not speculate about the number of accessories. If you need to confirm a specific accessory (bracket, screw pack, or whether a power supply is included) before ordering, please contact us first.
• Hong Kong authorized-market product, 2-year manufacturer's warranty, with local support.

Suitable Scenarios

E321 is suitable for indoor locations where budget is a priority but wide pan coverage is needed: living rooms, bedrooms, shop corners, and studios.

• Living Room and Dining Room
• Bedrooms and Children's Rooms
• Shop Corners and Checkout Areas
• Studios and Offices
• Pet Activity Areas

Why Choose This Model

• 3MP 2K, sufficient for indoor use
• 355°/90° Pan-Tilt + Auto-Tracking
• 12 m Infrared
• microSD 512GB
• Compact, 167g

Full Specifications

Same-series comparison

E321, E331, and E1 are three tiers in the same indoor pan-and-tilt camera series; the table below shows the official figures, with the E321 you are viewing highlighted.

Frequently Asked Questions

Looking for an affordable indoor pan-and-tilt camera?

Tell us the room size and the main area you want to monitor, and we can help you determine whether 3MP is sufficient or whether you should upgrade directly to the 5MP E331.

Hong Kong Authorized Stock｜2-Year Manufacturer Warranty｜Local Support