1.Because of international transportation, batteries cannot be sent, so there is no battery in the package! ! ! 2.We have English manual pdf, and operation video , if need, please contact us online. 3.pls evenly coated with gel on the probe before use.(As for gel, not included in the package because of the shipment limited. but you can buy at your local market easily. Gel is Lubrication, isolation of air. you also can use aloe vera gel, essential oil instead)