Specifications: -OS requirement:android 4.3 and above,IOS 7.0 and above,with BT 4.0 -Watchband meterial: TPU -Screen: 0.69" OLED 96*16 -Memory:64KB RAM + 64KB ROM -Standby time: Normally use for 7 days,standby for 3 mouths -Bluetooth:Ver.4.0(low power consumption) -Connecting:5pin Micro USB -Sensors:gravity acceleration sensor -Strap:Silicon rubber -Battery:40ma;data storage for 7 days;27 days for normal use -G-sensor:yes -Motor:built-in,vibration to remind -Incoming call alert and message alert only support Android device, don't support IOS device Features: -Sync call,call reminder,message reminder,clock,sedentary reminder -Lost warning,out of range alarm -Camera remote;video remote -Fitness information sharing -smart buttons:Exclusive first touch key,find phone,BT self-timer to take pictures,Bluetooth control mobile music playing -Task alert:can create at most 3tasks,will remind you by vibration or display -Maximum Function:Sedentary remind,Sleep monitoring,Alarm clock,stopwatch,Calculators,Time synchronization,Movement step record, calories calculation, movement mileage records,step counts,distance measuring,calorie consumption management Packing information: -Product size:2.32 inches,0.71 inches,0.52 inches -G.W.:1.22 lbs Package: -1 x J&E Smart Bracelet -1 x User Manual -1 x Charging Clip