Yes, the Pulse app is required to control the lighting of the Pulse bulbs.
Pulse is ran via Bluetooth
Since Bluetooth technology only allows one connection at a time, Pulse bulbs can only be controlled by one smart device at a time.
The Pulse system works using one Master bulb ( included in stater pack and is not sold on it own) and up to 7 satellites.
All Sengled music products use premium quality JBL speakers.
No, Pulse Solo works on its own and cannot be connected to any other product including Pulse Master, Pulse Satellites and Link.