Classical Neckband Sport Bluetooth Headphones with Super Long Standby Time

Sport Wireless BT Headphone, replacement for wired ones evermore!!
OEM/ODM factory, low price, high quality, professional service.Specifications:
*Bluetooth Version: V4.2
*Chip: JL6904
*Battery Capacity: li-polymer 350mAh
*Speaker Unit: 10mm
*Diaphragm: 6u
*Power rating: 3mW
*Subwoofer
*Impedance: 16Ω
*SNR: >=80db
*Distortion: <0.3%
*Frequency table: 2400.0-2483.5MHz unlicensed ISM band
*Noise reduction: CVC6.0
*Mic Dimension: 4.0*1.5
*Sensitiviry: <82dBm at <0.1%BER
*Bluetooth Profiles: HFP HSP A2DP AVRCP
*Charging time: 2 hours
*Music play/Talk time: 15 hours
*Standby time: 250 hours
*Work voltage DC3.3V to 4.2V
*Charger: DC 5V 300mAh
*Material: silicon, high-ray PC, electroplated button UV
*Product weight: 34gFeatures:
*Bluetooth stereo headset, perfect companion for Gym, running, jogging, hiking, cycling, lifting weights & more;
*Appearance Patent, CE/ROHS authenticated;
*Ring-necked design, quality elastic memory material, easy to carry;
*Vibrate to remind you not to miss any incoming calls;
*Super long standby time upto 250 hours, can play music upto 15 hours continuously;
*Hands-free calls, super HD clear sound quality;
*Bluetooth V4.2, intelligent noise cancellation;
*Support TWS function: one phone connect with two headsets simultaneously;
*Support pairing two phones at the same time;
*Color: black, white, gold, silverFunctions:
1.Answer, hang up
2.MIC
3.Volume+-
4.ON/OFF
5.LED
6.USB
7.Forward button
8.Backward button
9.Play/PausePackage conttents:
1pcs*bluetooth headset
1pcs*charging cable
1pcs*user manual
3pcs*earmuffs