Visa Wave credit card is read via a contactless reader (known as a "dongle") for transactions less than RM150. Any amount more than RM150* will be transacted via an EDC machine and a signature will be required.
No. Just hold your card within 4cm of the reader and your card will be detected.
Visa Wave is designed to be highly secure, with multiple layers of encryption and fraud detection. The card's signal is designed to operate over short distances to avoid interference and interception.