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Description: Output Power: 5mW Wavelength: 650nm Working Voltage: 5V Operating Current: less than 20 mA Laser Shape: Dot Working temperature: -10°C to +40°C Housing material: High quality Copper Dimensions: 6.5 x 18mm Wire connection: Red wire connect to Positive, Blue wire connect to Negative Package included: 10PCS 5V 650nm 5mW Red Dot Diode Laser Heads To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.