Highlights (the most important recommendation now):
Bluetooth volume control with amp, a complete new product for new market, that has the traditional volume control functions plus Bluetooth/analog, transmission and amplifier.
1- It can be installed to replace a traditional volume control;
2- Everyone, with Bluetooth transmission devices or 3.5 analogue jack, can play their favorite music independently of other rooms.
3- It is suitable for home, hotel, suntan salons, massage treatment rooms or anywhere that you would like an independent room with music. This is a stand alone Bluetooth and amplifiers built in.  The device is intended to be for single room operation for individual music tastes.
4- More convenient, easier, quicker installation than traditional volume controls, and there  is no need to redistribute the audio wires inside the ceiling or wall.  Existing 16 gauge speaker wire may be used.
5- Multi-color face plate available to match most other standard wallplate colors. White, Ivory and Almond included at no extra charge.
6- When installing it is possible to customize the Bluetooth name.
7- UL approved AC-DC power cord available.
8- Safe inner-wall DC power design.
9- Easy and entire 2.0 sound system, no need for an extra amplifier.

Bluetooth volume control with amp kit, and its audio distribution pictures

Accessories:
UL approved AC-DC power cord; DC socket with 3-color standard installation wall plates and pheonix plug behind the wall plate; 3-color face plates available for the BT VC.