Product_description: ['Easy alignment tools. A perfect alignment between transmitter and receiver is key to optimise the operation of the active beams. To make the optical alignment easier, the SL-350QDP chassis features vivid yellow colours to be seen from the distance and the "Sniper Viewfinder" , a telescopic lens magnifying twice the distance inside the beam. A sound gauge fitted in the receiver validates the accuracy of the optical alignment. For the fine tuning, the SL-QDP receiver is fitted with five LED to indicate the level of the signal received from the transmitter ranging from poor to excellent.']

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