Applicable people: business, adult, fashion, public, children Screen size: 1.1 inches Interface : none Camera: None Body memory: 1024k Screen material: Acrylic How to wear: Wristband Compatible systems: fully compatible Communication function: not supported Menu language : General Wireless distance: 5m (inclusive) -10m (inclusive) Battery capacity: 610mAH Mode of operation: push button Product size: 51*14mm Screen resolution: 240*20 Wrist strap material: PU Strap size: M/L (suitable for 160-210 mm wrist circumference) Function: Smart reminder Color: black, red, blue,