WHAT'S IN THE BOX: 15190T Data Logging Multimeter, Rechargeable Li-ion Battery, Battery Charger, Canvas Bag, Test Leads, Temperature Probe and Socket and Magnetic Hanging Strap. FUNCTION: Southwire's Bluetooth 15190T MaintenancePRO multi-meter and MApp mobile app are taking test and measurement to a whole new level. When used together, this system provides one of the safest and most convenient ways for electrical professionals to get the job done. BLUETOOTH INTERFACE: For downloading, viewing, and sharing on Southwire's MApp mobile app. onboard memory allows data logging even when Bluetooth wireless is not connected. ENHANCED FEATURES: This multimeter features an intuitive menu, hi-Res color display with graphing feature, an onboard memory for saving and viewing measurements and recordings. Rugged meter with CAT IV 600V / CAT III 1000V. MApp MOBILE APP FEATURES: View readings from a safe distance right from your mobile phone, Set up recording sessions, Add photos and notes to create a detailed report, Pull-up menu to modify meter settings remotely and E-Mail critical equipment issues to maintenance. SATISFACTION GUARANTEED: At Southwire, we strive to ensure that every product we develop helps increase safety, improve productivity, reduce manpower, save time and save money - both on and off the jobsite. After all, we don't just want to produce the most products. We want to produce the best products.