XO BS33 SPORT Neckband Bluetooth earphone

Headphone type: magnetic in-earBluetooth scheme: AB5616TBluetooth version: Bluetooth V5.3Bluetooth operating frequency: 2.402GHZ-2.480GHZSpeaker power: Rating 3-5mWFrequency response: 20Hz~20KHzSpeaker unit: speaker Φ 10mm@32ohmMicrophone: Condenser, -40dB±2Built-in battery: lithium battery – 3.7V, 105mAhStandby time: about 100HMusic time: about 10 hours (80% volume)Talk time: Approx. 7 hours (80% volume)Charging input standard: DC5V-500mA Micro USBCharging time: about 1.5 hoursSupported Bluetooth protocols: A2DP v1.3, AVRCP v1.6, HFP v1.7, HID v1.1, AVCTP v1.4, AVDTP v1.3, and SPP v1.2