Pioneer SE-C4BT(B) in-ear headphones (Charcoal black)

Headphones part
A model number: SE-C4BT
A model: Sealing type dynamic
A unit diameter: Φ 8mm
Reproduction frequency band: 10Hz - 20,000Hz
Mass: 13 g
Accessories: Earphone tip (silicon) S/M/L, microUSB cable
A battery duration (consecutive communication): Up to six hours (I include it at music reproduction time)
A charge time: Approximately 1.5 hours
A power supply: DC3 .7V built-in charge-type lithium ion battery

Bluetooth
A communication method: Bluetooth standard norm Ver .4.2
The output: Bluetooth standard norm Power Class 2
Maximum communications distance: Prospect distance approximately 10m
Use frequency band: 2.4GHz zone (2.4000GHz - 2.4835GHz)
An abnormality method: FHSS
Correspondence Bluetooth profile: A2DP, AVRCP, HFP
Correspondence codec: SBC
Correspondence contents protection: SCMS-T method
Multi-pairing: Up to eight

Remarks:
・Depending on the combination with the smartphone, I may not cope with some operation.
・Consecutive communication time may change by use environment.
・The communications distance is an aim. Communications distance may change by neighborhood environment.
・This product uses the electric wave of the 2.4GHz zone. A sound may break off by the interference such as a radio apparatus, the microwave oven using the other 2.4GHz zone.