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 personnelfunction as 3 in 1 : datalogger + multimeter + temperature metermulti-connection (more than one device) supported via mobile appthe change trend analysis accessible via special chart modevoice warning supported. which assures measurement safetysmart voice-reading accessible4(1/2)-digit -off option extending battery lifeBluetooth 4.0 version - supports mobile device with Android 4.3or above / iOS 7.0 or above OS. and equipped with 4.0 moduleoffline recording functionTrue RMS value availableColour:blue+blackMaterial:plasticPackage Contents:1X multimeter2X test lead1X thermocouple1X alligator clip1X Multi-function Test Bench1X cloth bag1X English manualOnly 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.