Product specifications of JBL (Jay Bieru) SYNCHROS REFLECT BT Product specifications Type: Sealed dynamic type (canal) sports with stabilizer Bluetooth: Bluetooth3.0 correspondence Frequency characteristic: 10Hz ~ 22kHz Sensitivity: 105dB/5mW Impedance: 32Ω Input plug: φ3.5mm stereo mini (L-type) Cable length: 0.5m (left and right earphone body between) Weight (body only): 18g Power supply: Rechargeable lithium-ion battery charging: about 2 hours, music playback: about 5 hours Accessories: charging cable sports with stabilizer ear tips (S / M / L) ※ M size has been put on