Casio SL-310TER+ Calculator 10 Digit
Professional calculator Casio with a slim case (a type of wallet) with a long-lasting battery to 3 years (for use of 1 hour per day) and a choice of an alternative solar charging.
With the possibility of conversion of foreign currency in euro €, auto power off in 6 minutes, and resistance to temperatures of 0oC to 40oC.