Specifications Mods! number ASE Frequency response 20Hz-20KkHz Bone conduction technology 7th generation Water resistance P55 Water-resistant chip QCC3024 Weight 29 grams Bluetooth® version Bluetooth Battery Rechargeable Li-Polymer Compatible profiles HSP, HFF, AVDP, RCPT Battery capacity 135 mah Frequency band 2402MHz-2480MHz Continuous play Up to 8 hours Maximum RF output power dame Standby time Up to 10 days Wireless range 33 foot (10m) Charge voltage 5.25V + 5% Speaker impedance 8.