A payment terminal includes a contactless payment transceiver, a display, and user input apparatus with a select, increase and decrease input. The payment terminal will display an initial numerical value, and respond to an increase input by incrementing the numerical value; a decrease input by decrementing the numerical value; a select input by setting a transaction amount; and use the contactless payment transceiver to initiate execution of a transaction for the transaction amount with a contactless payment token. The user input apparatus includes an aspect movable to positions either side of a zero position and is mechanically biased to the zero position. The payment terminal can control the rate of incrementing and decrementing the numerical value depending on a detected amount of deflection of the aspect from the zero position.