This is a regulator set. The main unit is a Bism model with a movable head for ease of use. The gauge and octopus are inexpensive Aqualung models. I purchased them about 8 years ago from Mic in Osaka. I've used them about 100 times, but haven't used them for a while since the pandemic, so an overhaul is necessary. A regulator bag is also included. The following is an AI comment: ---- 【High-Performance Regulator】 The Bism Legend of the Bism is a high-performance regulator perfect for diving. Its reliable design allows you to enjoy underwater exploration with peace of mind. 【With Pressure Gauge】 Equipped with a pressure gauge, you can easily check the remaining pressure. It supports safe diving. 【Durable Hoses】 The black and yellow hoses are highly visible and durable. They are designed to withstand long-term use. - Brand: Bism - Model Name: Legend of the Bism - Type: Regulator - Hose Color: Black and Yellow - Gauge: With Pressure Gauge - Logo: Legend of the Bism Thank you for viewing.