set database: LEGO 9747 mindstorms robotics invention system 1.5

set database: LEGO 9747 mindstorms robotics invention system 1.5

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set number: 9747
set name: mindstorms robotics invention system 1.5
theme: technic, mindstorms 1.5
year: 1999
pieces: 726
price: us$200
minifig: none

come with an intelligent brick, 2 9v mini motors, an infrared transmitter, 2 touch sensor, a light sensor, a brick separator and technic bricks.
the intelligent brick has 16-bit microprocessor, 3 input port, 3 output port and an infrared communication link.
instruction book included 3 robot designs.
great playability.
overall design is great.
must have for technic lovers.