$19.25 - $44.02

Bluetooth version: 4.1Built-in battery capacity: 50mAh-100mAh (included)Signal-to-noise ratio: ≥ 100dBFrequency range: 20Hz-20KHzRated Power: 3Rated Voltage: 5Appearance size: 15mmBattery life: 6-8h (included)Radio head: CapacitorWith a built-in battery or not: Built-in battery