SPECIFICATIONS

Versatile & Focusable! 9mm Adjustable Red Laser Head, Dot/Line/Cross Spot, 650nm 5mW, 3V Power, for Arduino, Leveling, DIY Creative Projects.

Key Features & Benefits:

🔧 Precision Brass Focus, Twist to Change: Unique brass threaded housing allows fine focus adjustment like a lens, delivering sharp dot, line, or cross spots from near to far field.

🔴 650nm High-Visibility Red, Stable & Long-Lasting: 5mW output at 650nm. Highly visible in daylight, excellent at night. >1000 hours typical lifespan. Low power, reliable.

⚙️ Three Practical Spot Patterns: Choose from Dot (precise pointing), Line (leveling, marking), or Cross (center alignment) to suit measuring, layout, positioning, and educational needs.

🔌 Plug & Play, Easy Integration: Pre-focused at factory with open pins. Simply provide a stable 3V DC supply (current-limiting resistor REQUIRED!). No complex optical alignment. Easily integrates into Arduino, Raspberry Pi, or your DIY electronic kits.

🛠️ Full Copper Housing, Excellent Heat Dissipation: The all-brass housing aids focusing and provides good thermal performance for stable, prolonged operation.

Product Description:

This 9mm adjustable red laser head is the ideal optical component for makers, engineers, and hobbyists. It integrates a laser diode and collimating lens in a compact brass shell, producing a low-divergence, uniform beam. Perfect for upgrading laser levels, making custom pointers, building security systems, or conducting optics experiments—a reliable, controllable source of coherent light.

🚨 CRITICAL SAFETY & USAGE NOTES (READ FIRST!):

❌ 【LASER SAFETY WARNINGS (STRICTLY PROHIBITED)】:

NEVER look directly into the beam or point at eyes! Even when off, accidental activation can cause permanent eye damage.

Avoid reflective surfaces! Glass, mirrors, metal can reflect the beam, causing indirect injury.

Not a toy, keep away from children! Unsuitable for minors or persons untrained in laser safety.

Laser safety goggles recommended! Especially during alignment or with invisible lasers, use matched-wavelength glasses.

Do not aim at vehicles! Never point at cars, aircraft, etc., to avoid distracting operators.

⚠️ 【Critical Usage & Wiring Requirements】:

Current-Limiting Resistor REQUIRED! For longevity, you MUST use a series resistor to limit operating current to <20mA. For prolonged use (>30 mins), use a higher value to prevent overheating. (We strongly recommend our Driver Kit SKU).

Strict Voltage & Polarity: Use a 3V DC power source. Reverse connection is PROHIBITED! Reverse voltage >1V may permanently damage the laser.

Mind Heat Dissipation: Ensure adequate ventilation or add a small heat sink during continuous operation.

Secure Mounting: Fix the laser head firmly with glue or a clamp to prevent focal shift from vibration.

✅ 【Required Skills & Accessories】:

Basic soldering skill is REQUIRED.

You need to provide: 3V power supply (e.g., 2xAA battery holder), appropriate current-limiting resistor (calculate or use our kit), multimeter (to measure current).

This is the laser head ONLY. NO power supply, resistor, or driver circuit is included.

Specifications:

Model: 9mm Adjustable Red Laser Head (Brass Housing)

Laser Color: Red

Wavelength: 650nm

Output Power: 5mW

Spot Type: Dot / Line / Cross (select when ordering)

Operating Voltage: 3V DC (Rated)

Operating Current: < 20mA (Recommended)

Max Forward Voltage: ≤ 4.5V (Transient)

Max Reverse Voltage: ≤ 1V (Do not exceed)

Spot Size (@15m): φ10mm ~ φ15mm

Effective Range: Up to 200-1000m at night (Weather dependent)

Operating Temperature: -10℃ ~ +40℃

Housing Material: Adjustable Brass Sleeve

Dimensions: Ø9mm × ~30mm (Excluding pins)

Pin Status: Unsoldered (Straight pins)

Package Includes:

1 × 9mm Red Laser Head (Spot type as per selected SKU)