Welcome to our shop! 100% brand new and high quality. These laser modules are perfect for laser sensor projects. They have a working voltage of 5V and a power of 5mW. They are small in size and lightweight, making them convenient to use. Each set includes four modules that can be used for various projects. Specifications: - Power: 5mW - Laser Wavelength: 650nm - Laser Color: Red - Working Voltage: 5V - Size: 1.5*2.8cm/0.59*1.1in - Quantity: 4pcs - Weight: 3g (approx.) Package Includes: - 4 x Laser Modules 100% Satisfaction: Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactory after-sales service.