Yu Yi Ling Bluetooth Earphone WVV Wireless Headset

Specification: - Size: single head (length: 31 MM, width: 15 MM, height: 13.3 MM) - Charging port: magnetic - Key: 1 long press to power off (play / pause / answer / hang up) - Headphone charging display / charging completion display: charging red light is always on / full red light (light blue light) - Headphone battery: lithium polymer rechargeable battery, 50MAH - Headphone charging current: 47 mA - Headphone charging time: 1Hour - Working voltage: 3V- 4.2 V - Listen to music current: MAX 24mA maximum volume - Call current: MAX 24mA maximum volume - Headphone standby current: 1mA - Shutdown current: 7.2uA - Headphone standby time: about 40hs - Music time: about 2 hours - Talk time: about 2 hours - bluetooth version: bluetooth 5.0 - bluetooth chip: WT200U - Support Profile: HSP, HFP, A2DP, AVRCP - Remote control function for the player: NC - Pairing name: HBQ-Q13S - Pairing code: 0000 - RF transmit power: class 2 - RF input impedance: 50 ohm - RF emission intensity: 9 dBm - RF receiving sensitivity: -89dBm - Transmission range (Hz): 2.40GHz~2.48GHz - Communication distance: 10m - TWS function: NC - Audio sampling accuracy: 16bits - Audio sampling rate: 44.1~48kHz - Audio encoding format: CVSD, mSBC, SBC, AAC - Signal to noise ratio: >95dB - Working temperature: -15 ° C ~ +60 ° C - Working humidity: 10%~85% (non-frozen state) Headphone horn parameters - Speaker specifications: Φ8mm - Impedance: 32Ω - Frequency Frequency (Hz) 80Hz-18KHz - Sensitivity: 85±3dB - Input power: regular 2mW, maximum 5mW MIC parameters - MIC type: silicon microphone - MIC sensitivity: -42±3dB - SPL: 130dB Charging box basic parameters - Charging port: USB / solar panel - Input voltage: DC5V 1.0A - Charging current: about 334mA - Output voltage: DC5V - Discharge current: NC - Working te