It encourages intellectual functions, understanding of time, logical thinking and mathematical intelligence.
Stainless steel ring, mechanism: SEIKO PC2I. 1.55V, mercury free watch battery (lasts approximately 2 years).
Resistant at 3 ATM (to water splashes). Not waterproof.
Gift set with wrist watch, compass, hook-karabiner, LED torch with hook for hanging up. Exclusive design.