- 3 injections speeds : slow, medium, fast. -Main unit battery : 2000 mAh. Charging time : about 2.5 hr ( 3hr for the first charge). -Disposable injection needle for option , meeting strict infection control requirements. -E20G-Nr. -E23G-Nr. -E25G-Nr. -Injection needle specifications: -E20G-S. -E20G-M. -E20G-L. -E23G-M. -E23G-L. E25G-M. -E25G-L. -Guarantee period 15 months. **For further product information, please contact chat support** -