Usage Tips:300kg/50g Bluetooth-Compatible Crane Scale Rechargeable Portable Hanging Industrial Hook Scales Stainle Steel With 4.0 BT USB 50% OFF Optional Blue tooth 4.0 function; Built-in 400 mAh lithium battery; Three functions of charging, plug-in, and AAA battery, super loud buzzer prompt; Super long range Full viewing angle LCD; High-grade white LED backlight with purple background; Bold stainle steel hook, waterproof mask, waterproof ring design at the handle connection; High-strength ABS engineering plastic shell, thickened stainle steel environmentally friendly electroplating hardware; Industrial-grade materials and workmanship, durable. Specification Shell material: ABS engineering plastic Body size: 7.6 x13.8x3.9cm LCD size: 52 x 23mm Hardware wire diameter: 10 mm Color box size: 17.5x16.7x5.2 cm Unit: kg, lb, vi (Fez) Version: Normal version, Blue tooth version (optional) Color: Black, Orange Range: 300kg/50g (upper can weigh 300kg, division value 50g, lower can weigh 0.2kg, error 0.1-0.3kg) The functions are: switch, unit/lock, reset and tare, when weighing, the value can be selected manually/automatically, zero tracking, 120 seconds automatic shutdown, unlock function Package included Please scan the code to download the supporting APP (Android or Apple application market search Weiheng Smart APP download)