| Image |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
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| Price | | | 10 USD | | | | | | | 9 USD | 11 USD | 13 USD | | | | | | | |
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| Specifications | | | | | | | | | | | | | | | | | | | |
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| Bluetooth version | 4.1 | 4.1 | 4.1 | 4.1 (upgrade?) | 4.1 | 4.1 (upgrade?) | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 | 4.1 ? | 4.1 |
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| Bluetooth Profile | | A2DP/HFP/HSP/AVRCP ? | HFP v1.6 AVRCP v1.4 A2DP v1.2 DI v1.3 HSP v1.2 | | | | | | | HSP/HFP/A2DP/AVRCP | HFP, HSP, AVRCP, APT-X | HFP v1.6 AVRCP v1.4 A2DP v1.2 DI v1.3 HSP v1.2 | | | | | | | |
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| Sync multiple devices | Yes | Yes | Yes | | Yes | Yes | | Yes | Yes | | Yes | | | | Yes | Yes | | | |
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| Remark | | | | | | | | | | | | | | | | | | | |
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| Audio features | | | | | | | | | | | | | | | | | | | |
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| apt-x | | No | No | | | | | | | | Yes | | | | | | | | |
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| Active Noise Canceling | Yes | Yes cvc6.0 | | Yes ? | Yes cvc6.0 | Yes dsp | Yes cvc6.0 | Yes cvc | | Yes cvc6.0 | Yes cvc6.0 | Yes cvc6.0 | | | | Yes cvc 6.0 | | | |
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| stereo | | | | Yes | Yes | Yes 3d | | | | Yes | Yes | | | | | | | | |
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| HD | Yes | Yes | | | | Yes | | Yes | | | | | | | Yes | Yes | | Yes subwoofer, 360gr shock bass | |
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| Sensitivity | 120 db | 102 db | | 98 db | 112 db | 109 db | | 102 db | 123 db | 112 db | 105 db | 122 db | 96 db | | 123 db | 120 db | 87 db | 123 db | |
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| Resistance | 16 Ω | 32 Ω | | 16 Ω | 16 Ω | 32 Ω | | 32 Ω | 16 Ω | 32 Ω | 16 Ω | 32 Ω | 32 Ω | | 9 Ω | 16 Ω | 16 Ω | 96 Ω | |
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| Product details | | | | | | | | | | | | | | | | | | | |
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| Built-in microphone | | Yes | Yes | | | | | | | | | | | | | | | | |
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| Chip | CSR (8635 ?) / britain imported | csr8615 | csr8615 | csr | csr8 | csr 4.1 of 4.0 | iscc | CSR (8615?) | CSR8635 ? | | csr | csr8635 | csr8635 | csr8610 | csr britain imported | issc imported, 8 level, 80mhz cpu / csr | | csr | csr8615 |
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| Extra earpiece | | Yes ? | | Yes | Yes | | Yes | Yes | | Yes | | | | | | | | Yes | |
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| Brand | cosline | | | | | | | | | | | | | | | | | | |
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| Model number | | | | | | | | bt/20160608 | rd-188 | | | | | | s18 | | | | |
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| Release date | 2017 ? | 2016 ? | | | | | | 2016 ? | 2017 ? | | | 2017 | 2016 | | | 2016 ? | | | |
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| Volume control | Yes | Yes | | Yes | Yes | Yes | | Yes | | | Yes | | | | Yes | Yes | Yes | | |
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| Voice control | Yes | Yes | | | Yes | | | | | | | | | | Yes | | | Yes | |
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| Next music | Yes | Yes | | Yes | Yes | | | | | | Yes | | | | Yes | | | Yes | |
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| English | - ? | | | | Yes | | | | | Yes | | | | | | Yes | | Yes | |
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| Battery | | | | | | | | | | | | | | | | | | | |
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| Talk time | 28 h | 32 h | | 36 h | 30 h | 25 h | | 28 hd | | | | 6 h | | | 28 h | 3 h | | 28 h | |
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| Music time | 24 h | 30 h | | 32 h | 24 h | 24 h | | 24 h | | | 5 h | | | | | 4 h | | 24 h | |
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| Standby | 35 d | 55 d | 60 d | 70 d | 45 d | 1080 h | | 40 d | 160 h | | 200 h | 30 d | | | 60 d | 55 h | | 40 d | |
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| Charge time | 3 h | 2 h ? | 2 h | | | | | 2 h | | | | 2 h | | | | 2 h | | 2 h | |
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| Battery capacity | 300 mah | 230 mah | 350 mah | 300 mah | 260 mah | 230 mah polymer | 150 mah | 230 mah? | | 90 mah | | 110 mah | 70 mah - 90 mah | | 260 mah | 55 mah | | | |
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| Battery Information | | - ios | | Yes 4 leds | Yes 4 leds | - ios | | - ios | | | | | | | - ios | - ios | | - ios | |
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| Dimensions | | | | | | | | | | | | | | | | | | | |
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