Features:      <br />1. with pull-type light source switch<br /><br />2. with hand strap， convenient to put in bags or take everywhere.<br /><br />3. can be used under insufficient sunlight or dark environment.<br /><br />4. transducer between currency detecting lamp and LED lamp<br /><br />5. size: 6.2cm x 3.8cm<br /><br />6. mai lens: 30x -21mm<br /><br />7.3 x LR1130 button batteries are included<br /><br />8.Great for viewing banknotes， jewelers， watches， gems， beads， may， coins and stamp<br /><br />Package Included:      <br />    1 x Detecting Jewellery Identifying Magnifiers