[3] Handspring first introduced the Visor Solo, which was black and contained 2 MB of onboard memory.

The Visor Deluxe had the option of translucent colored models, and had 8 MB of onboard memory.

The Visor and Visor Deluxe used Palm OS 3.1H running on a Freescale DragonBall processor, a modified version of the OS from Palm that included an enhanced datebook, a city time graphical world clock, and an advanced calculator.

Unlike the Palm Pilot, the Visor's IrDA port was placed on the side of the device to make room for the Springboard Expansion Slot.

Like Palm's IIIc, Prism's color screen turned nearly pitch black in sunlight.

However, despite the shoehorn-like contoured back to support the rechargeable battery, it did have the Visor Springboard slot; the infrared port was again on the side.

The Platinum included a 33-MHz Motorola DragonBall VZ processor while the Deluxe only supported a 16 or 20-MHz chip.

At the time of the release of the Platinum, it sported the fastest processor for a Palm OS device.

[7] Released in March 2001, the slim Visor Edge featured an MC68VZ328 DragonBall CPU clocked at 33 MHz.

It had 8 MB DRAM, an IrDA-compliant infrared interface, and Handspring's standard Springboard slot.

The 4.8 in × 3.0 in × 0.7 in unit, weighing in at 5.4 ounces, came in sleek, translucent Blue, Red, or Smoke-grey colored case.

Weighing 5.7 ounces, the unit came with 16 MB RAM, a built-in microphone, and Handspring's Springboard slot.

The Treo line met with success, attributed in large part to Handspring's in-house VisorPhone software, which was tightly integrated with the Palm OS.