3 NO COLLECTION , ONLY SENT BY POST , FREE DELIVER WITH IN 1 TO 3 DAYS Intelligent anti-lost: two-way alarm anti-lost Simple operation: one-click operation Compact: light carrying belt Portable and compact Stylish and beautiful Good material, wear-resistant, long life Specifications: Material: plastic Color: black Size: 38*38*7mm Battery capacity: 220mAh Package included: 1 x Anti-lost Notes: Due to the difference between different monitors , the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures. Due to the manual measurement and different measurement methods , please allow 1-3cm deviation