I paid RM220 for Lexin B4FM (share 4 riders) in 2018. I think they increased the price to RM300 plus for nrw model (10 riders). Clear and long battery life. Highly recommended.

Yes

From its manual,

With the LX-B4FM you can call hands-free on your Bluetooth mobile phone, listen to stereo music or voice instructions of GPS navigation, and activate wireless Intercom for rider-to-rider or rider-to-passenger conversation within a range of 1600 meters when four units are connected.

5.6 Function Priority LX - B4FM operates in the following order of priority : 1. Mobile phone ( highest ) 2. Intercom 3. Bluetooth stereo music , FM radio ( lowest ) lower - priority function is always interrupted by a higher - priority function . For example , stereo music is interrupted by an Intercom call , and Intercom conversation interrupted by an incoming mobile phone call .