solar dc cable solar- panel supplies supply wire connection

product size: l90*w54*h13 mm/3.5*2.1*0.5 inch testing time: 5 seconds power source: batteries memory: 200 sets measuring range: 20 mg/dl - 600 mg/dl (1.1 mmol/l - 33.3 mmol/l) 1.large screen, large font, convenient for the elderly to view. 2.small size for easy carrying. 3.high-speed and accurate detection. 4.professional and reliable.