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Ships within 48 hours · Estimated delivery Oct 7 - Oct 12
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Description
VIKEFON BT-21 Bluetooth 5.0 Adapter Bluetooth Audio Transmitter Receiver1. Bluetooth version: V5. 0 2. Support protocol: RX supports A2DP, AVRCP, TX supports A2DP 3. Working frequency band: 2. 402GHz 2. 480GHz 4. Power level: Level 1 5. Sensitivity: 80dBm is less than 0. 1% BER 6. Signal to noise ratio: greater than or equal to 75dB 7. Distortion: less than or equal to 0. 1% 8. Support dual stream (TX mode supports one transmitter to connect two Bluetooth speakers or headphones at the same time to use one CODEC) 9.
1. Bluetooth version: V5.0
2. Support protocol: RX supports A2DP, AVRCP, TX supports A2DP
3. Working frequency band: 2.402GHz-2.480GHz
4. Power level: Level 1
5. Sensitivity: -80dBm is less than 0.1% BER
6. Signal to noise ratio: greater than or equal to 75dB
7. Distortion: less than or equal to 0.1%
8. Support dual stream (TX mode supports one transmitter to connect two Bluetooth speakers or headphones at the same time to use one CODEC)
9. Support multi-point connection (RX mode supports connection of two mobile phones)
10. Codec mode: TX is apt-X HD, apt-X LL, apt-X, SBC; RX is apt-X HD, apt-X LL, apt-X, SBC
11. Note on using APTX: apt-X HD CODEC is preferentially supported in single connection (the connected device must also support apt-X HD)
12. Built-in battery: 1000mAh
13. Charging current: about 200mA
14. Charging time: about 4.5 hours
15. Life time: RX is greater than 20 hours, TX averages about 15 hours
16. Bluetooth distance: greater than 80m (straight line without obstruction)
17. Charging method: Micro USB 5V/0.5A
18. Input/output connection: SPDIF interface, I2S AUX interface
19. Compatible: Android, IOS system phones, tablets and Bluetooth speakers or headphones that support A2DP protocol
20. Dimensions: 114 x 100 x 20mm
21. Weight: 270g
Specification:
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
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4.4 ★★★★★
Based on 25 reviews
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Product Reviews
★★★★★ 5
great soda
Flavor Name: Diet Coke, Size: 12 Fl Oz (Pack of 12)
Deluctible took a bit to arrive over all good, were still coldish when arrived
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Review
Flavor Name: Diet Coke, Size: 7.5 Fl Oz (Pack of 10)
Love diet coke and I don't waste as much with the mini cans.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Yummy Blueberries I Eat Daily
Size: 1 PT
These are good and rarely have any mold on them. They are in good condition and taste yummy. They usually last for about a week and have a wonderful taste. I enjoy them.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
Always the best quality, sweet and delicious, no bad berries in this bunch!
Size: 1 PT
I love these blueberries, they are so sweet and fresh, I eat them like candy, lol. These are not always on home delivery, so I don't buy all the time, but, I love it when Amazon excludes them from "fresh" delivery, I could eat these all day. I never liked blueberries much because of mushy, over-ripe, quality, and these are ALWAYS DELICIOUS!
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Flavorful and good quality
Size: 1 PT, Size: 1 PT
Flavorful, big, and overall good quantity! Out of 2 pints, maybe 3 berries were squished... which is better than most grocery stores I've experienced.
I wasn't sure what to expect from Amazon delivery blueberries, especially for the amazing price of $0.79 per pint. They were delivered in an insulated foil-lined paper grocery bag with a frozen bottled water inside to keep them cool. The pints were closed with rubber bands around them to minimize spills. I opened the bags within a few minutes of delivery so I cannot say how cold it would stay if I didn't bring it inside immediately, but the frozen bottled water was only slightly melted upon delivery so they had kept well.
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Reviewed in the United States on May 16, 2026