A standard cooling fan is essentially a bladed DC motor. By varying the voltage input across the acceptable range for a fan, the speed of the fan will increase (to added voltage) and decrease (to reduced voltage); a faster fan means more air moved and thus a higher heat exchange rate.
Contact them toll-free from a Vodacom cellphone by dialing 111. Contact them toll-free from a Telkom phone by dialing 0800-111-234. Note: Telkom toll-free numbers are generally NOT toll-free when dialed from a MTN/Vodacom cellphone.
If you want Vodafone Customer Care Services in your own language, you can dial Vodafone Regional Customer Care Number according to your region. To contact Vodafone Customer Care Executive, please dial 111, then press 7 and listen to all the options and again press 1. Vodafone Assam Customer Care Number: 9706097060.