Wansview W3 User Manual page 21

IP Camera W2(1080P)/W3(720P)
Volume Setting
If volume of the "Talk" and "Listen" is too low, user can adjust it from Volume Setting
AC Frequency
User can adjust the power frequency, power frequencies include:50HZ(220V voltage
selects 50HZ), 60HZ(110V Voltage selects 60HZ).
For 60HZ, the highest frame rate can be 30fps, and 50HZ is 25fps.
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