Mini Invisible Ultra Small Bluetooth

Model: s530x product type: one-ear bluetooth headphone material: abs size: 28×15×16mm usb cable length: 10cm bluetooth version: v4.0 + edr radio frequency: 2.402-2.480ghz impedance: 32ω sensitivity: 80db transmission power: class 2 support a2dp: music play (audio output: 35mw, play / pause) multi-point connections: can be connected with two bluetooth devices simultaneously transmission range: 10m charging power: ac input 110-220v; dc output 5v charging time: about 2 hours charging voltage: 3.7v talk time: 2-4 hours music playback: 3 hours standby time: 120 hours working current: 15mah wearing styles: in-ear, invisible patented product built-in battery type: 50ma rechargeable lithium battery