New 600g Digital Pocket Scale-Weigh Hydroponics Grow System Plant Nutrients Choose From 4 Different Modes!: Gram (g), Ounce (oz), Troy Ounce (ozt), Pennyweight (dwt) Capacity & Accurcary: 600 x 0.1 g, 21.2 x 0.005 oz, 386 x 0.1 dwt, 19.2 x 0.005 ozt Durable clear plastic cover doubles as an expansion tray Set includes scale, clear cover, batteries, box, instructions, and LIFETIME WARRANTY!