About Product:Hj-q223: Intelligent step test tester: Measurement resolution: 0.1cm,\nMeasurement accuracy: ±0.2%\n2. Weight test range: 5kg-150kg\nMeasurement resolution: 0.1kg,\nMeasurement accuracy: ±0.3%\n3. Supply voltage: AC220V/DC12\n\n1. All products are equipped with the language prompt function of real person occurrence, the whole test results and operation steps of voice real time, simple and convenient operation.\n2. Wireless transmission mode can be used to communicate with the computer, so as to avoid wire bundle entanglement or the need to move the instrument for transmission. Single data in sequence and calculation