HMC-K18
Product Features and specifications

Features：
1）Sharp rising Hi-energy sound with Titanium 10mm dia.
2）The style of the battery case is fixed with a clip to prevent
      the battery box from shaking
3）Equipped with an embedded controller that can operate
      music, animation, and talk on the ear

Communication system:                  Bluetooth version 4.2
RF power output:                              0.7mW EIRP
Maximum communication range:   Line of sight - approx.10m(33’)
Frequency band :                              2.4GHz(2.402 GHz to 2.480 GHz)
Support codec:                                  audio,AAC,SBC
Type:                                                   Dynamic
Driver:                                                  8.6mm / 10mm
Sensitivity:                                         108 dB / mW
Frequency response:                       5 to 20,000 Hz
Impedance:                                       16 Ω
Operating time:                                 Continuous transmission time including
                                                            music playback time:Max approx. 5 hours* 
                                                            Continuous standby time:Max approx. 200
                                                            hours*
Other
Power supply:                                  DC 3.7 V lithium polymer battery
Charging time:                                 Approx. 2 hours*
Operating time :                               Continuous transmission time
Continuous standby time:              Max.approx.200 hours*
Weight:                                              17 g(0.6 oz)

Accessories：
USB charging line (Type-A/Micro USB Type-B)
EarPiece(S,M,L)、
Clip，
Storage bag