Product characteristics: Name: Wireless Bluetooth Outdoor Mini-card speaker 2. Soundbox power supply: 3.7V 500MA 3. Charging output voltage: 5V 500MA 4. Product Size: 75MM Height, 75MM Horizontal Diameter 6. Bluetooth version: Bluetooth V4.2 + EDR version 7. Bluetooth hands-free call function, intelligent voice prompt function, 8.360 degree five-pointed sound, conical diffuser Terms of sales: 1.Any question, please contact us, we will response to you within 24 hours and solve the problem for you.