Screen size :1.1 inches. Camera: no Communication function: not supported. Product weight :33g. Interface: USB 2.0 Band size: single size: suitable for 150-200 mm wrist circumference. Screen material :oled Wireless distance :5m(including)-10m(including) Applicable people: adult, public, fashion, business, old man. Body memory :32+32. Battery capacity :240mAh. Mode of operation: touch-tone type. Wrist strap material :tpu. Product size :43.5*45.5*13.2mm. Compatible system: fully compatible. Compatible platform :ANDROID. Function: waterproof How to wear: wristband. Additional functions: health monitoring, information push, intelligent reminder, step, motion tracking, sleep analysis.