1. Einleitung
The RockSeed Mileseey Cross Line Laser Level L52R is a precision instrument designed for various leveling and alignment tasks. It projects bright red horizontal and vertical laser lines, offering high visibility and accuracy for both professional and DIY applications. This manual provides essential information for the safe and effective use of your laser level.
2. Sicherheitshinweise
WARNUNG: This is a Class 2 laser product with a power output of <1mW. Direct exposure to the laser beam may cause eye injury. Always follow these safety guidelines:
- Blicken Sie nicht direkt in den Laserstrahl.
- Richten Sie den Laserstrahl nicht auf Menschen oder Tiere.
- Avoid operating the laser level near reflective surfaces that could redirect the beam into your eyes or others'.
- Do not allow children to operate the laser level.
- Verwenden Sie das Gerät nur für den vorgesehenen Zweck.
- Do not attempt to modify or disassemble the laser level.
3. Packungsinhalt
Überprüfen Sie, ob alle Artikel im Paket vorhanden sind:
- 1 x RockSeed Mileseey Cross Line Laser Level L52R Tool
- 1 x Tragetasche aus Segeltuch
- 1 x Magic Strap
- 2 x AA-Batterien
- 1 x Bedienungsanleitung (evtl. nicht in deutscher Sprache).

Image: Contents of the L52R package, showing the laser level, carry case, magic strap, batteries, and manual.
4. Einrichtung und Batterieinstallation
4.1 Einlegen der Batterie
The L52R laser level operates on two AA batteries. To install or replace batteries:
- Suchen Sie die Abdeckung des Batteriefachs am Gerät.
- Öffnen Sie die Abdeckung.
- Legen Sie zwei AA-Batterien ein und achten Sie dabei auf die richtige Polarität (+/-).
- Schließen Sie den Batteriefachdeckel fest.
4.2 Montagemöglichkeiten
Das Laser-Nivelliergerät bietet vielseitige Montagemöglichkeiten für verschiedene Anwendungen:
- Magic Strap Installation: The card slot at the back of the machine allows for installation with the included magic strap. This enables easy attachment to irregular pillars or posts.

Image: Laser level secured to a column with the magic strap, demonstrating its use.
- Magnetische Befestigung: The powerful magnet design allows the laser level to be easily attached to various iron frames and walls, providing stable laser lines.

Image: Laser level attached to a metal beam via its magnetic base, showing its versatility.
- Stativmontage: The device features a 1/4" thread mount, allowing it to be attached to a standard tripod or other compatible fixtures and accessories for height adjustment and precise positioning.

Image: Laser level on a tripod, used for aligning pictures on a wall.
5. Betriebsarten
The L52R laser level features two primary operating modes:
5.1 Self-Leveling Mode (Auto Balance Mode)
This mode automatically levels the laser lines within a certain tilt range.
- Aktivierung: Unlock the pendulum by sliding the switch to the 'unlocked' position.
- Betrieb: If the tilt angle is ≤ 4°, the laser level will automatically project horizontal, vertical, or cross lines.
- Anzeige „Wert außerhalb des zulässigen Bereichs“: If the device is tilted beyond 4°, the laser lines will flash to indicate an out-of-level condition. Adjust the device until the lines stop flashing and become steady.
5.2 Manueller Modus (Sperrmodus)
Dieser Modus ermöglicht es Ihnen, Laserlinien in jedem gewünschten Winkel zu projizieren.
- Aktivierung: Lock the pendulum by sliding the switch to the 'locked' position.
- Betrieb: In this mode, the laser lines are locked and will not self-level. You can manually place the unit at any angle to project tilted lines for tasks like staircase alignment.
- Alarm: A speaker alarm may sound when adjusting in manual mode, indicating the pendulum is locked.

Image: Visual explanation of the self-leveling and manual lock modes.
6. Bedienung
6.1 Powering On/Off and Switching Lines
Use the main power switch to turn the device on or off. Press the mode button to cycle through horizontal line, vertical line, or cross line projection.
6.2 Anwendungen
The L52R laser level is suitable for a wide range of tasks, including:
- Pflastersteine
- Installing photos, doors, and windows
- Möbelschreinerei
- Tapezieren
- General alignment and layout tasks

Image: Various uses of the laser level in different home improvement and construction tasks.
7. Wartung und Pflege
To ensure the longevity and accuracy of your laser level:
- Reinigung: Wischen Sie das Gerät mit einem weichen, damp cloth. Do not use harsh chemicals or abrasive cleaners. Keep the laser output window clean.
- Lagerung: Store the laser level in its canvas carry case in a dry, cool place, away from direct sunlight and extreme temperatures. Remove batteries if storing for extended periods.
- Schutz: The device has an IP54 protection grade, making it resistant to dust and splashing water. It also features 4 ft. collision protection. However, avoid unnecessary drops or impacts.

Image: Laser level demonstrating its IP54 water and dust resistance.
8. Fehlerbehebung
- Laserlinien blinken: In self-leveling mode, this indicates the device is tilted beyond its 4° self-leveling range. Adjust the position of the laser level until the lines become steady.
- Keine Laserlinien: Check if the device is powered on and if the batteries are correctly installed and charged.
- Ungenaue Zeilen: Ensure the device is on a stable surface and within its self-leveling range (if in self-leveling mode). Avoid strong vibrations during operation.
9. Technische Daten
| Marke | Steinsamen |
| Modell | L52R |
| Laserklasse | Klasse 2 |
| Leistungsabgabe | <1 mW |
| Messbereich | Up to 50ft (approx. 15m) |
| Genauigkeit | ±1/8 of an inch at 30 Ft (±3mm at 10m) |
| Selbstnivellierender Bereich | ≤ 4° |
| Schutzgrad | IP54 (staubdicht, spritzwassergeschützt) |
| Fallschutz | 4 Fuß. |
| Material | Metall, Kunststoff |
| Artikelgewicht | 460 Gramm |
| Betriebsmodus | Automatisch, Manuell |
10. Garantie und Support
The RockSeed Mileseey Cross Line Laser Level L52R is covered by a ZWEIJÄHRIGE Garantie. For any product questions, technical assistance, or warranty claims, please contact RockSeed customer support. Refer to the contact information provided with your purchase or visit the official RockSeed webWebsite.
Official Mileseey WebWebsite: www.mileseeytools.com