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ST-2001 Wireless Neck Strap In-Ear Headphones with HRM

A wireless heart rate monitoring in-ear headphones, allowing to stream the pulse readings directly to your phone for data analysis and receive real-time updates through headphones with a single touch

Bluetooth version: V5
Chipset: SBS2000 by WBD101
Battery capacity: 130mA
Standby time: 7 hours
Music playing time: about 5 hours (without HRM function);4 hours (with HRM function)
Charging time: about 2 hours
Distance: more than 10 meters (outdoor without blockage 360°)
Speaker: ¢ 10mm
Speaker sensitivity: 110+/- 2dB
Microphone sensitivity: 42 +/- 3dB