Hi,please send me the best offer for Wrist band GPS tracking sos bracelet elderly smart watchDesign:Bar Display Color:Black White Screen Resolution:160x128 Display Type:TFT Screen:< 2" Camera:No Camera Operation System:both andriod and ios Feature:3G,GPS Navigation,MP3 Playback Color:Black,Orange,Blue,Purple,White Product Name:Wrist band GPS tracking sos bracelet elderly smart watch SIM Card:Single nano SIM Card Charging method:Magnetic charging Battery:450mah Li-polymer Storage:NOR 32M Battery charge:2 hours Standby time:4 days Platform scheme:MT2503D Wristband material:TPU Gsm:900 1800