The Ultra ships with two Bluetooth receivers. Each one attaches to a pad or accessory and takes its treatment wirelessly from the device, so nothing runs between you and the Ultra itself.

Adding receivers adds treatment points. The Ultra runs up to four Bluetooth receivers alongside its two wired ports, which is six points in total - enough for several areas at once, or several people.

Each receiver comes with a sticker sheet for marking channel numbers, which is worth using once you have more than two.