-For Presentations or conferences, it would be with a red laser pointer with outputs of 50 to 100mW (milliwatts) or green 20 to 50mW will be more than enough, besides being the most economical.
-Ngenxa ye-Presentations noma izingqungquthela, kuzoba ne-red laser pointer nokukhishwa okungu-50 kuye ku-100mW (milliwatts) noma okuluhlaza okuyi-20 kuye ku-50mW kuzoba okwedlula okwanele, ngaphandle kokuthi kungokonga kakhulu.