Casting content from a phone, tablet, or computer to a TV wirelessly may seem like a simple connection, but in reality, it’s a full test of the device’s video output capability, protocol compatibility, power stability, and wireless signal conditions. Each type of device supports different casting methods, and only by understanding port functionality, transmission limits, and the surrounding environment can you achieve smooth, high-quality screen mirroring.

1. Casting from Phone to TV

1.1 Port Compatibility and Setup

One of the first hurdles many users face when casting from a phone to a TV is the port issue. Just because an Android phone has a USB-C port doesn’t mean it can send video. Some models only support charging through that port. Visually, the connectors all look the same, but whether they can handle video depends on the phone’s internal hardware.

To avoid frustration, always check your phone’s specs. Search the product manual or the manufacturer’s site for terms like “video output” or “DisplayPort Alt Mode.” If you’re using an iPhone, you’re in luck—AirPlay makes wireless casting easy and doesn’t require any cables.

Lemorele’s P400 wireless HDMI kit supports three modes: USB-C wired mode, AirPlay, and Miracast. This means it works with both iOS and Android, as long as the phone supports the right output method. It’s especially handy when traveling, giving quick access to big-screen viewing for streaming, impromptu presentations, or photo sharing with friends.

1.2 Signal Stability and Power Supply

The quality of your wireless casting experience depends heavily on the environment. If your phone and the TV are in the same room with no major obstacles between them, the P400 can deliver smooth video with a delay of about 50 milliseconds—good enough for both movies and slide shows.

However, signal issues can arise if you're trying to cast through concrete walls or across different rooms. For best performance, place the receiver close to the TV in an open, visible spot. Keep a clear line of sight between the receiver and your phone whenever possible.

Also, don’t rely on your TV’s USB port for power—it’s usually underpowered and may cause disconnects or blackouts. Instead, use a dedicated 5V/2A power adapter via USB-C. That little step makes a big difference in keeping the connection stable.

The P400’s compact design makes it easy to carry. You can fit both the transmitter and receiver in a laptop sleeve or travel pouch. Whether you're working remotely, relaxing in a hotel, or setting up a quick meeting, just plug it in and start casting—no fuss.

2. Casting from Tablet to TV

2.1 System Support and Casting Modes

Tablets work similarly to phones, but their use often leans toward education and live demos. Before connecting, you’ll want to confirm that your tablet’s USB-C port supports video output—not all of them do. Devices that can connect directly to the P400 transmitter with no setup required.

If you prefer a wireless approach, iPads can use AirPlay, while Android and Windows tablets often support Miracast. Just follow this simple sequence: check the tablet's casting capability → choose the mode → power both ends. The P400 takes care of the pairing automatically.

One of the P400’s key advantages is that you don’t need to install any apps or drivers. It supports all major systems, including Windows, macOS, iOS, and Android. That’s a big time-saver for teachers, speakers, or trade show presenters who need reliable screen mirroring without technical hiccups.

2.2 Stable Signal and Multi-Device Switching

Classrooms and conference halls tend to be larger, with more interference. This makes device placement and power supply even more important. Position the receiver close to the TV’s HDMI port in an open space, and use a stable power adapter to minimize the chance of signal loss.

The P400 offers up to 50 meters of transmission distance in open environments, enough for most classroom-to-screen setups. If you’re managing multiple tablets, you can use multiple transmitters paired to a single receiver. Just note that only one device can display content at a time in this mode.

For simultaneous displays across multiple TVs or projectors, the “one-to-many” broadcast mode lets you send the same signal to several screens. To keep transitions smooth, label each transmitter and set the switching order in advance. This is especially useful in classrooms (e.g., switching between students), exhibit booths, or team demos, where fast handovers matter.

3. Casting from Computer/Laptop to TV

3.1 Port Selection and Ease of Use

Computers and laptops offer more flexibility in connection options. The P400 works best with HDMI ports or USB-C ports that support video output. Once you confirm your device has one of those, setup is plug-and-play.

Older laptops with USB-A ports won’t work with the P400, which skips the driver headaches and avoids compatibility issues with legacy hardware. This streamlines the process and aligns with most modern business devices.

Here’s how to get started: Connect the receiver to your TV’s HDMI port and power it up → plug the transmitter into your laptop and power it up → wait a few seconds for auto-pairing. Then go into your display settings and choose between “mirror” mode (same screen on both devices) or “extend” mode (use the TV as a second screen). This makes multitasking—like reading notes on your laptop while showing slides on the TV—much easier.

3.2 Power Setup and Display Quality

Long meetings or full-day exhibitions demand stable power. To avoid dropouts or flickering, always use a separate 5V/2A adapter for both the transmitter and receiver. Skip powering through the TV’s USB port or using a hub—those are often unreliable.

P400 delivers up to 1080P resolution at 60Hz, which is more than enough for business reports, product videos, or classroom slides. It also supports synced audio output, so you won’t need a separate speaker setup.

If the screen looks cropped or stretched, just adjust the resolution and display ratio from your computer’s settings. If you’re still hearing sound from the laptop instead of the TV, switch the audio output to HDMI—it’s a quick fix that completes the viewing experience.

Business IT teams will appreciate the cable-free setup that reduces clutter and installation time. Startup founders can bring it to pitch meetings and demo days for quick, reliable visuals. Educators benefit from seamless device switching in class. And designers get a clean, large-screen canvas to showcase their work with confidence.