Group 1 - The product features a steady pulse water flow for effective teeth cleaning and gum care [2][5] - It offers three water pressure modes and has a 150ml water tank [2][5] - The product comes with two standard nozzles and is priced at a maximum of 129 yuan [4][5] Group 2 - The product is available through official direct sales with a one-year replacement and repair warranty [5] - There is a promotional activity where users can receive a 10 yuan reward for sharing pictures [4][5]