Features:

Model: HV-TW959
Powerful Bass Performance
Ergonomic In-ear Buds Design
Low latency Mode for 65ms delay
Master-Slave Switch
Specification
Frequency : 20Hz to 20KHz
Impedance : 40 Ohm
Power Output :DC 5V 1Amp
Connection Type : Wireless
Microphone :Adaptive 4 microphone ENC technology
Battery :Earbud Battery: 40mAh*2
Charging Case Battery: 470mAh
Duration :Play Time: 4-5H
Total Battery Life: up to 24H