(16 shades of gray) Size: 4.49 x 3.02 x .46 in. (11.41 x 7.67 x 1.17 cm) Weight: Battery: Internal Lithium Polymer Rechargeable; 2hr recharge time when empty AC Adapter: Input: 120 V 60 Hz 10 W, Output: 5.0 VDC 1.0 A IrDA port Expansion Slot compatible with SD and MMC cards Palm m505 The m505 was, at the time of the series rollout, the top-of-the-line model of all Palm devices. It also had 8 MB of on-board memory. In addition to standard m500 series features, it also featured a 16-bit color frontlit screen. It was released on March 6, 2001, as part of the original rollout for the series. Details Operating System: Palm OS version 4.0 (upgrade to 4.1) Processor: 33 MHz Motorola Dragonball VZ Memory: 8 MB (4MB Flash + 8MB RAM) Display: 160x160 pixel color display (65,000+ colors) Size: 4.48 x 3.03 x 0.50 in. (11.38 x 7.70 x 1.27 cm) Weight: Battery: Internal Lithium Polymer Rechargeable; 2hr recharge time when empty AC Adapter: Input: 120VAC 60 Hz 11W, Output: 5.0VDC 1.0A IrDA port Expansion Slot compatible with SD and MMC cards Palm m515 On March 4, 2002, Palm released the m515. Based on consumer reviews and surveys conducted by the company, the m515 was developed as an improved version of, and replacement for, the m505. Notable enhancements include 16 MB of on-board memory and an enhanced backlighting system. There was much criticism about the m505 that, even with the backlight on, it was dim and difficult to read in some environments. The m515 added an additional setting allowing the backlight to be put on "high", which was considerably brighter than its predecessor. Details Operating System: Palm OS version 4.1 Processor: 33 MHz Motorola Dragonball VZ Memory: 16 MB RAM + 4 MB Flash Display: 160x160 pixel color display (65,000+ colors) Size: 4.48 x 3.03 x 0.50 in. (11.38 x 7.70 x 1.27 cm) Weight: Battery: Internal Lithium Polymer Rechargeable AC Adapter: Input: 120VAC 60 Hz 11W, Output: 5.0VDC 1.0A IrDA port Expansion Slot compatible with SD and MMC cards References New Sleek Palm m500 and m505 Handhelds Add Expansion, Mobile Connectivity and Vibrant Color, Palm Press Release, March 19, 2001 New Palm m130 and m515 Handhelds Add Spring Color to 2002 Product Lineup, March 4, 2002 Niles, Steve, "Why the Palm m500 Series is Ideal for the Enterprise", September, 2002. PalmPower Magazine Enterprise Edition, Issue 2002–09.