The Atmel JTAGICE3 kit contains these items:
JTAGICE3 unit
USB cable (1.8m, high-speed, mini-B)
Adapter board containing 50-mil SPI, 100-mil SPI and 100-mil JTAG adapters
50-mil JTAG cable
50-mil 10-pin mini squid cable
AVR Technical Library DVD
Figure 1. JTAGICE3 kit contents