Concrete test hammer, Brick Test hammer, Mortar Test hammer, High Strength Test hammer, Voice digital Test hammer. Features:1.The host and ... the outliers can be automatically removed. 8. Test hammer using imported parts, mechanical parts machining high precision ... : Maximum backlight situation≈100mA (Voice off)Communication interface:USB2.0 full-speedWeight:1.1Kg Voice Digital Test Hammer HT-225V