Laser Source TW3110 is the most rugged small size instrument in the industry. It integrates super small size and strong function in one unit. With 3 pieces of 1.5V alkaline batteries, it can work continuously for more than 40 hours. The total weight is only 110g. Together with the TW3205 Mini Optical Power Meter, it provides an excellent solution for fiber optic network and for field work. Features High stability of the output power Economic type, easy to use Matched with the TW3205 Mini Power Meter, it constitutes the smallest optical loss test kit, perfect for field testing ApplicationsMaintenance in TelecomMaintenance CATV Test Lab of optical fibers Other Fiber Optic Measurements