The GROVE-T is a T-shaped hub. Does this remind you of the HUB unit? They are basically the same thing, just in different shapes. This is also used for HY2.0-4P port expansion. Note: The GROVE-T is just a hardware expander, if you are looking for a hardware and software (standard protocol) expander like I2C, or Single-bus, please check PaHUB or PbHUB. If you connected two I2C slave devices onto HUB that share the same address, you will have a problem getting I2C data from both. Cables and UNIT are NOT included. Specifications Resources Parameter Net weight 4g Gross weight 19g Package Size 200 x 100 x 10mm Resources * Product Wiki https://elecena.pl/product/23605605/grove-t-connector-5-pack 2023-06-06 https://elecena.pl/product/23605605/grove-t-connector-5-pack 2023-12-27 https://elecena.pl/product/23605605/grove-t-connector-5-pack 2024-09-18 https://elecena.pl/product/23605605/grove-t-connector-5-pack 2024-11-29 https://elecena.pl/product/23605605/grove-t-connector-5-pack 2024-11-30 https://elecena.pl/product/23605605/grove-t-connector-5-pack 2025-11-28 https://elecena.pl/product/23605605/grove-t-connector-5-pack 2025-11-29