1. Built-in 400 mAh lithium battery charging, 3xAAA battery power supply, can be plugged in for continuous use, super loud buzzer prompt. full-view LCD; high-grade background white LED backlight; thickened stainless steel hook, waterproof mask, waterproof ring design at handle. 2. High-strength ABS engineering plastic shell, thickened stainless steel environmentally friendly electroplated hardware; industrial-grade materials and workmanship, . 3. Functions include: switch, unit/lock, clear and peel/manual lock selection, zero point , 120 seconds automatic shutdown, When weighing, the value can be locked automatically or manually, and unlocking function can be . Model:C06 Product Name:Portable electronic crane scale Range:300kg/50g (upper can weigh 300kg, graduation value 50g, lower can weigh 0.2kg, error 0.1-0.3kg) Unit:kg, lb, () Specification:B:With Bluetooth Colour:Black Material:ABS+Metal Package Contents: 1 x Electronic Crane Scale Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.