The unit is only 4.3-cm by 3.2-cm (1.7-inch X 1.3-inch). Rechargeable battery. I don't know anything about them. Does anybody know of a better product? (even if slightly more expensive). I believe it requires a SIM card that is not included, no idea what that would cost.
http://www.ebay.com/itm/Mini-GPS-GP...-for-Children-Old-People-Car-A8-/360740312349
http://www.ebay.com/itm/Mini-GPS-GP...-for-Children-Old-People-Car-A8-/360740312349