Description: Golf putter laser sight pointer provides high performance for Golf. Very easy to connect with the golf club helps improving the accuracy. 2 Modes: Automatic mode (INT) and Uninterrupted mode(CON). Give a laser guide line during your putt to check your putting plane and can be used indoors or outdoors. Great for anyone who wishing to get more proficiency to improve the accuracy of the technique. Specification: Material: Plastic Battery: 3x LR44 Button Batteries (Included) 3 LR44 batteries can be replaced when used up. Automatic mode (INT): Press the purple button above the laser, the laser head at the front end of the push rod sight shoots a red laser.(Laser extinguishes automatically after 10 seconds) Uninterrupted mode(CON): Laser emitting red laser light, light not extinguish.(Used when adjusting the laser angle) After continuous use for 30 to 45 minutes in the CON mode, the battery voltage will decrease. If the laser light turns dark, turn off the laser for about an hour after leaving it in a safe place and wait until the battery voltage rises and you can continue to use it. CON mode is not recommended for prolonged use. Size Chart: Size: 13x4.5x2cm/5.12x1.77x0.79inch Package Includes: 1 Piece Golf Putter Laser Pointer Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.