It compatible with all 12-volt vehicle Lead acid batteries;Voltage: 9-16V With Bluetooth 4.0; Supports Solar Power Systems/RVs/Motorcycles/Boats/Cars/Trucks with All 12 Volts. Automatic LowVolt Alarm: Alert user if battery is LowVolt when enters Bluetooth range in 10 meters. Safe and Reliable: Battery load tester tells you everything about the battery: voltage, charge,cranking power, Engine starting detect automatically, etc. Free app for both iOS & Android, IOS: IOS 7.1 and Later Available: Android 4.3 and Later Easy to Operate: Battery Monitor’s App is Battery Monitor BM2. Please scan machine backup or user manual scan code to download software. Connecting Bluetooth and open app, no code, you can know battery or battery load’s Condition and check charging and starting system, list time of each driving. QUICKLYNKS Auto Battery Monitor BM2 Bluetooth 4.0 12V Device Car Battery Tester For Lead acid Battery Functions Include: Battery Monitor Trip Monitor Charging Test Cranking Test Compatible: All 12v Lead acid batteries, including car, motorcycle, solar, Yachts , iPhone, android phones Supports Language: Arabic, Czech, German, English, Spanish, French, Italian, Norwegian, Polish, Romanian, Russian, Slovak, Chinese Features： Wireless battery monitoring via mobile device Monitor multiple batteries with the one app Bluetooth connectivity , free app for iOS & Android (Battery Monitor BM2) Receive notifications of your battery condition via the app Alert mobile phone if some data abnormal Short circuit and reverse connection protection Data stored for up to 31 days if out of sync Review and store historical data Compatible with all 12-volt vehicle Lead acid batteries(do not suit For Lithium batteries) Records trip duration Simple, cheap and effective protection Battery type support: Lead acid, Gel, AGM & Flooded Compatible: All 12v Lead acid batteries, including car, motorcycle, solar, Yachts , iPhone and android phones Bluetooth version: 4.0 OS: IOS and Android Data Storage: 31 days in the device ,unlimited storage in smartphone Working Temperature: 0 to 50°C (32 to 140 F°) Storage Temperature: -20 to 70°C (-4 to 158 F°) Certificate: CE FCC ROHS PAHS REACH Size: 115*72*20mm(L*W*H) Weight: 100g Specifications: Input Voltage: 6V-20V Average Current: 1.5mA Operating Temperature -40 to 90℃ Bluetooth Range: 10 Meter Product Dimensions: 5.5 x 3.5 x 1.6cm Voltage Accuracy: (9-16V) ± 0.03V Bluetooth Name: Battery Monitor App Keyword: BM2 Package List: 1pc x Battery Monitor BM2 1pc x User's Manual