USB,1.77'' color TFT LCD,Applicable for:Family,individual user,Battery:rechargeable lithium battery,Bluetooth transmission.: Yes,Dimension: 100mm(L)×45mm(W)×15mm(H),Weight: about 60g,Bluetooth,Automatically start measurement,store ECG, upload data, download health conclusion,Continuously record for up to 500 cases in full c,Bluetooth transmission.,ECG data can be saved to CLOUD Platform permanentl,Historical data can be printed at any time