Please choose the correct ending to complete the given sentence: Computers and Electronics: [header] How to transmit audio with a laser pen [title] Read things you'll need [title] Remove all batteries from the laser. [title] Connect a clip lead to the inside of the laser pointer where the battery touched. [step] Usually there is a small spring to which you can attach the clip lead.

Ending1: [title] Turn on the laser and press go so the laser will light up. [step] If the laser displays a range of colors, put the clip lead one of them to the bottom of the laser pointer, rather than the more basic battery lead to keep it on for very specific tasks on a laser. Ending2: [title] Connect the laser magnifying glass to the laser pointer. [step] Tilt the laser and place the laser pointer in the range of the laser pointer or magnifying glass. Ending3: Connecting this clip to the inside of the laser pointer would greatly reduce the incidence of radioactivity on the laser pointer. [title] A small sliding tab or open usb strip will go into the laser pointer. Ending4: The other end of the battery usually connects to the case of the laser. Since there are many different styles of laser pointer, you may have to experiment with clip lead placement to get the laser to work with the new external battery pack.

Answer format: ending1/ending2/ending3/ending4