1. Important Safety Information
Please read this manual carefully before using the MiLESEEY S50 Laser Distance Meter. Failure to follow these instructions may result in laser radiation exposure, electric shock, fire, or serious injury.
Laser Safety
The MiLESEEY S50 emits Class II laser radiation. Do not stare directly into the laser beam. Direct exposure to the laser beam may cause eye injury.
- Laser Type: Class II Green Laser (500-530nm, <1mW) and Class II Red Side Laser (630-670nm, <1mW).
- Never look directly into the laser beam or point it at other people.
- Do not disassemble or modify the device.
- Keep the device out of reach of children.
2. Product Overview
The MiLESEEY S50 is a professional laser distance meter designed for accurate and efficient measurements in various environments. It features advanced green laser technology for enhanced visibility and a wide range of measurement functions.

Image: The MiLESEEY S50 Professional Green Laser Distance Meter.
Key Features
- 4x Brighter Green Laser: Provides superior visibility compared to standard red lasers, especially in outdoor conditions.
- High Precision & Speed: Utilizes MILESEEY's patented PowerBurst™ technology for stable measurements up to 120m with ±1.5mm accuracy, even in challenging conditions. Up to 8 measurements per second.
- 18 Measurement Modes: Includes P2P (Point-to-Point), area, volume, indirect measurements, continuous measurement, and more.
- Flexible References & Units: Easily switch between 4 reference points (front, rear, tripod, lateral laser) and 8 units (ft, 0'00"1/32, 0'00"1/16, in1/32, in1/16, in1/16, cm, m).
- 6.1 cm IPS Backlit Screen: High-resolution display with automatic black and white background switching for clear readings in various lighting conditions.
- Rechargeable NiMH Batteries: Powered by 2xAA 1800mAh NiMH batteries, offering all-day use and USB-C charging.
- Smart App Integration: Streamline workflow with smart applications for visualizing measurements on floor plans, exporting data, creating reports, and unlimited cloud storage.
- Durable Design: Constructed from robust engineering plastic, IP54 dust and water-resistant.

Image: Enhanced visibility of the green laser beam.

Image: PowerBurst technology for consistent precision.

Image: The 6.1 cm IPS backlit screen in different lighting conditions.
Package Contents
The MiLESEEY S50 package includes:
- 1 x MiLESEEY S50 Laser Distance Meter
- 1 x Storage Case
- 1 x Lanyard
- 2 x AA NiMH Rechargeable Batteries
- 1 x USB-C Charging Cable
- 1 x User Manual
- 1 x Quick Start Guide

Image: Contents of the MiLESEEY S50 box.
3. Setup
Battery Installation and Charging
The MiLESEEY S50 uses 2xAA NiMH rechargeable batteries. Ensure batteries are correctly inserted according to polarity markings. For optimal performance, fully charge the batteries before first use.
- Open the battery compartment cover.
- Insert the 2xAA NiMH batteries, observing the correct polarity.
- Close the battery compartment cover securely.
- Connect the device to a power source using the provided USB-C cable for charging. The screen will indicate charging status.

Image: MiLESEEY S50 with batteries and USB-C charging cable.
Powering On/Off
- To power on, press the Power button.
- To power off, press and hold the Power button for a few seconds. The device will also automatically power off after a period of inactivity to conserve battery.
4. Operating Instructions
Basic Measurement
To perform a single distance measurement:
- Point the laser at the target surface.
- Press the MEAS button (green triangle). The measurement will be displayed on the screen.

Image: Performing a basic distance measurement.
Changing Units and Reference Points
- Press the Unit button to cycle through available measurement units (e.g., meters, feet, inches).
- Press the Reference button to change the measurement reference point (front, rear, tripod, lateral laser).
Selecting Measurement Modes
The MiLESEEY S50 offers 18 different measurement modes. Press the Mode button to cycle through the available functions. The screen will display an icon representing the selected mode.

Image: Visual representation of the 18 measurement modes.
5. Advanced Features
P2P (Point-to-Point) Measurement
The P2P mode allows you to measure the distance between two points from a single location, which is particularly useful for inaccessible areas.
- Select the P2P measurement mode.
- Aim the laser at the first target point and take a measurement.
- Aim the laser at the second target point and take another measurement.
- The device will calculate and display the distance between the two points.

Image: Demonstrating P2P measurement functionality.
Smart App Integration
Connect your MiLESEEY S50 to the Smart Life app for enhanced functionality and data management.
- Download the "Smart Life" app from your device's app store.
- Follow the in-app instructions to pair your S50 device via Bluetooth.
- Once connected, you can view measurements on floor plans, export data, create reports, and utilize unlimited cloud storage for your projects.

Image: Smart Life app integration with the MiLESEEY S50.
Lateral Laser Alignment
The red lateral laser alignment feature helps in precise alignment and layout tasks, providing visible markers up to 1 meter.

Image: Using the red lateral laser for alignment.
6. Maintenance
- Clean the device regularly with a soft, damp cloth. Do not use abrasive cleaners or solvents.
- Ensure the laser lens is clean and free from dust or debris for accurate measurements.
- Store the device in its protective case when not in use to prevent damage.
- If the device will not be used for an extended period, remove the batteries.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low or depleted batteries; incorrectly inserted batteries. | Charge or replace batteries; check battery polarity. |
| Inaccurate measurements. | Dirty laser lens; unstable measurement surface; extreme environmental conditions. | Clean the lens; ensure a stable measurement; avoid measuring in conditions outside specified operating range. |
| Laser beam not visible. | Bright ambient light; laser is off. | Use in lower light conditions or use the green laser for better visibility; ensure laser is activated. |
| Cannot connect to Smart Life app. | Bluetooth is off; device not in pairing mode; app issues. | Ensure Bluetooth is enabled on your phone; restart both devices; check app permissions. |
8. Specifications
| Feature | Detail |
|---|---|
| Brand | Mileseey |
| Model Number | S50 |
| Measurement Range | Up to 120m |
| Measurement Accuracy | ±1.5 mm |
| Laser Type (Main) | Class II Green Laser (500-530nm, <1mW) |
| Laser Type (Lateral) | Class II Red Laser (630-670nm, <1mW) |
| Display | 6.1 cm IPS Backlit Screen |
| Power Source | 2xAA NiMH 1800mAh Rechargeable Batteries |
| Charging Port | USB-C |
| Material | Acrylonitrile Butadiene Styrene, Rubber |
| Water Resistance | IP54 (Dust and Water Resistant) |
| Weight | 150 Grams |
9. Warranty and Support
The MiLESEEY S50 Laser Distance Meter comes with a 24-month manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For warranty claims, technical support, or any inquiries, please contact Mileseey customer service through the retailer where the product was purchased or visit the official Mileseey website for contact information.
Please retain your proof of purchase for warranty validation.