General Features & Specification : Groovy design , handy , Nice gripping. Pressure Detection: Semiconductor Memory: 60 sets of memories for 1 person Power Supply: 2 x AAA batteries Auto Power Off: 3 min. after last key operation Oper. Temp./ Humidity: +10 to +40, 10% to 85% RH Storage Temp./Humidity: -20 to +60, 10% to 95% RH Weight of Main Unit: Approx. 120g (ex. batteries) External Dimensions: 80(L) x 85(W) x 35(D) mm Arm / Wrist Circumference : 135 ~ 220 mm Certificated : CE & FDA.