Description: With its small and compact size, the battery tester can be easily stored in the glove box or center console. What it will do is quickly help you determine if your car's battery needs a jump start, or to be changed. Thanks to the BT battery tester designed for all 12V batteries, you can check the overall health of your battery, which includes battery test, cranking test and charging test. Made from ABS and electronic component material, the product is durable and compact. The length of the product is 5.5 cm, the width is 3.5 cm. It is suitable for checking starting/cranking system when each time engine started, and it checks battery health and starting voltage each hundredth of a second when the engine is starting. Item Name: Battery Tester Material: ABS,Electronic Component Connection Method: Bluetooth-compatible 4.0 Voltage Accuracy: ±0.02V Input Voltage: 6-20V Operating Temperature: -40 to 85 Degrees Celsius Features: Anti-corrosion, Flame-retardant, High Accuracy APP Available: for Android 4.3 and Later for IOS 7.1 and Later for iPhone 4s and Later for iPad 3 and Later Size Details: 5.5cm x 3.5cm/2.17" x 1.38" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Battery Tester