Features:
--Enhanced powerful sound: Build-in bio-diaphragm driver with high precision and high sensitivity to bring you a more realistic sound
--Intelligent noise reduction, intelligent recognition of environmental noise, upgrading of chips, ensuring high-definition calls.
--IPX6 waterproof, sweat-resistant and rain-resistant. Even for long outdoor sports or cycling, hiking, running and exercise, you will no longer worry about sweating.
--Long Use Time: Equipped with 500mAh charging case, the earphones can be recharged 3-4 times to keep your music playing, providing stability and long time use.
--Full Touch Control: Adjust music, handfree calls, and activate voice assistants with ease with super-sensitive in-ear controls. Volume control is also included for your convenience;

Specifications:
Name: Bluetooth Earphones
Bluetooth-compatible chip: AD6973D;
Bluetooth-compatible protocol: HFP, HSP, A2DP, AVRCP;
Bluetooth-compatible version: Bluetooth-compatible V5.3;
Frequency range: 2.402GHz-2.480GHz;
Transmission distance (obstacle-free): ≤10 meters;
Sound channel system: true stereo in-ear type;
Speaker impedance: 16Ω/Ф6mm;
Speaker output power (Max): 5W;
Headphone sensitivity: 106dB;
Frequency range: 50HZ-20KHZ;
Distortion: <1%;
Signal-to-noise ratio: ≥90dB;
Power display: support;
Talk time: 5H;
Playing time: 5H;
Standby time: 100H;
Normal power working range: 3.3V≤BAT≤4.2V;
Low battery warning range: 3.0V≤BAT<3.3V;
Low power shutdown state: BAT≤3.0V;
Headphone battery capacity: 50mAH polymer battery;
Charging voltage ±0.25V: DC 5V;
Charging box battery capacity: 500mAH polymer battery;
Headphone charging time ±0.2H: 1.5H;
Bluetooth-compatible headset weight: 25g;

Packing list:
2 x Bluetooth earphones
1 x Charging case
1 x USB cable
1 x instruction manual