The Sapphire series represents a revolutionary new pulse generator technology that offers full function in a compact and cost effective package. At just 7.125“ x 5.1“ x 1.5” this is one of the smallest units available, but you will not be disappointed in its performance, features, or programmability. Finally, a low-cost pulse generator that does not skimp on performance or function. This instrument also has wireless capabilities (optional) via Bluetooth allowing you to communicate without a USB or RS232 connection. Another new feature, is you can power this unit with USB, freeing you from an extra cord.