For top 500th、 you will get 1-20th、$12.99 21-400th.$14.99 401-500th、$16.99 normal price:$18.99  Specification:               Display         0.91 inch OLED screen               Language         Chinese、English               Optional Colors         White、Black、White、Blue、Red、Purple、Yellow               Dimenssion         225(L)!#!amp!*!times;24(W)!#!amp!*!times;12(H)mm               Battery         80mAh               Standby Time         7-12 days(In Theory)               Bluetooth         4.0 or abrove               Charge Method         USB charge               Buttons         Support physical buttons               Chipset         Nordic               OS for APP         Support IOS7.0 or abrove、Android 4.3 or above               Heart rate monitor         Support               Time         Support               Date         Support        Functions: Heart rate monitoring、recording your health status. Sleep monitoring、recording your sleep quality and wake you up on time. Music and camera control、play music and take photos anytime and anywhere. APP、enter bracelet app to changing-over the music. Pedometer、recording and setting your sport plan. Waterproof、HS100 professional 30M waterproof 、enjoy swimming time. Smart reminder、install the app、sync the message of your chatting software through bluetooth.  Package Included: 1*H3 Smart watch