Lithium battery No. 2 protocol 4-inch large screen, light sensing function, NFC card switch Operating voltage: DC24V/36V/48V/60V/72V Rated operating current: 12mA Leakage current: Less than 1uA Screen size: 4.0 inch LCD Operating temperature: -20 ° C ~ 60 ° C Storage temperature: -30 ° C ~ 70 ° C Boot password System unit switch (km/hormph) Assist level control and display Battery Indication:Battery Level Percentage, Low Voltag eIndication Speed Display:(inkm/hormph) Distance:single-tripdistance(TRIP),total Travel Distance(ODO) Assist Mode Controland Display(3/5/9levels) Walking assist mode FrontLight Indication: front Light Status Supported By Controller. Error Code Indication Riding : Status,Front Light Status,Cruise,Low Voltage. Turning Signals:This Function Works With Controller. Dual Drive Controland Display:This Function Works With Controller. Statusof Double Battery Packs:optional,works With Controller. NFCF unction: optional. Bluetooth Connection: optional, support OTA upgrade via mobile phone Material: ABS colour: Black Type: Waterproof Package Contents: 1 x Electric Bicycle Display Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.