Return Policy Fast Delivery Trusted seller Auto Battery Monitor BM2 Bluetooth 4.0 12V Device Car Battery Tester Product Description It compatible with all 12-volt vehicle 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. Shipping Returns Payment Shipping Shipping is FREE to all addresses other than APO/PO boxes in the lower 48 states. All our stock ships from US-based warehouses. Shipped via USPS or UPS (depending on location and package weight) Unless stated otherwise, all orders will ship within 24-72 hours of your payment being processed. Check our feedback to see the great reviews of FAST shipping we offer. Returns Seller does not accept returns Payment We currently accept payment via eBay managed payments only. Once payment is cleared, we will dispatch your shipment within 1-3 business days. Please refer to the "Shipping" tab for more information regarding shipping speed to your destination.