Feature:1. WIRELESS INTEGRATION: The concrete digital rebound hammer features a wireless design combining the main unit and display, offering portability and increased work efficiency.2. USER FRIENDLY INTERFACE: Equipped with an organic LCD display screen and a Chinese interface, this tool ensures easy operation and a user friendly experience.3. SENSITIVE TOUCH KEYS: The sensitive touch buttons resist aging and enable smoothly operation, while the automatic recording function improves measurement efficiency.4. CONTACTLESS REFLECTIVE GRATING SENSOR: By adopting a non contact reflective grating sensor, this tool minimizes mechanical wear, poor contact, and offers high accuracy and long lifespan without traditional mechanical potentiometers.5. USB INTERFACE AND ADVANCED FEATURES: With a USB interface, this device acts like a USB drive without the need for special drivers. It also features a real time clock calendar function, adjustable backlit, auto sleep, and auto shutdown, offering advanced low power capabilities.Specification:Item Type: Concrete Rebound HammerMaterial: Stainless SteelPlug: US Plug 100-240VBattery: 1 x Lithium Battery (Built in)Capacity: 1050mAh (Single Battery Capacity).Package List:1 x Concrete Digital Rebound Meter1 x Sanding Stone1 x Spring Part1 x Screwdriver Part1 x Screwdriver1 x Data Cable1 x Power Adapter1 x CD2 x Gloves1 x Cleaning Cloth1 x Cleaning Solution3 x Washers1 x Spring1 x Storage Box1 x Storage Case