B41T+41/2 high-precision multi-function digital multimeter, can measure AC and and current, resistance, capacitance, frequency, diode, temperature, and other functions. The value supports Bluetooth through the handheld operation record, through the special chart mode to visit the change trend analysis. It is an perfect tool for electronic and electrician maintenance and product development personnel function as 3 in 1 : datalogger + multimeter + temperature meter multi-connection (more than one device) supported via mobile app the change trend analysis accessible via special chart mode voice warning supported, which assures measurement safety smart voice-reading accessible 4(1/2)-digit -off option extending battery life Bluetooth 4.0 version - supports mobile device with Android 4.3 or above / iOS 7.0 or above OS, and equipped with 4.0 module offline recording function True RMS value available Colour:blue+black Material:plastic Package Contents: 1X multimeter 2X test lead 1X thermocouple 1X alligator clip 1X Multi-function Test Bench 1X cloth bag 1X English manual 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.