Halo Pet Microchip Reader Scanner, Pink Reads all most 10 digit microchips, and will only display if a 9 digit Avid Friendchip is detected (not display a number). No batteries needed. Comes with rechargeable USB lead that can be used to charge in the wall or in a car 12V USB charger. Works with Windows 98 or later software. NOT COMPATIBLE WITH MAC. Carrying Case sold separately Does not read AKC microchips