Model: UP9000B-50T Capacity: 50T Division: 20kg Function: printing,adding up etc. Power: 6v rechargeable power supply,free of maintenance. Temperature: -30℃～60℃ Characteristic: 1.The liquid crystal of large screen shows and shows is in poor light 2.Input 10 lines of topics heads 3.Man-machine conversation 4.The entire keyboard calebrates