Detachable chain: the package includes a pocket watch and a gold necklace with hook; The detachable chain is easy to assemble and disassemble Way to open: the quartz pocket watch is designed simply; You can press the crown on the top of the watch and the front plate will be opened; Note: this product is a quartz bag, not a mechanical pocket Setting time: pull the crown away from the base of the watch and turn the crown clockwise until the exact time is reached, then press the crown back to its original position Size: this silver pocket watch has a diameter of approx. 4.6 cm, small size for easy carrying; the chain is 37 cm long, long enough to secure the pocket watch easily Good gift choice: good for weddings, cosplay, festivals, anniversaries, performances; A wonderful gift for your loved ones, family members or someone close to you