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Ships within 48 hours · Estimated delivery Jul 17 - Jul 22
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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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4.4 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Loving it so far
Format: Paperback, Format: Paperback
I really didn't know what to expect with a book full of names, but I love a murder mystery & needed more post work hobbies, so I thought this would be interesting & was I right. This book has been so engaging and keeps my mind in a good focused place instead of the usual dissociation after a stressful day of work or doom scrolling. It was nice to come up with my own little system as to how I would solve the clues on each page & keep track of everything. If you're interested in puzzles, or just need something interesting to keep busy, I feel this is a great concept to solve a mystery. 100% would recommend.
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Love it
Format: Paperback
Excellent book. Whole I was watching Tik Tok so.eone gave the answer and ruined my chance to finish it. I was within 1 to 2 days of solving it. Fun and challenging.
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Reviewed in the United States on April 23, 2026
★★★★★ 5
So much fun! And typos have been fixed!
Format: Paperback, Format: Paperback
This was so much fun! Some reviews will mention that the solution is spoiled at the end or there is some misspellings but it should be fixed. In the book you get an option to go to her blog. I 100% recommend checking that and it’s where you will check your answer! I got my whole family into this book and everyone is enjoying finding the name. I definitely recommend if you want to work on something that challenges your brain!
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Reviewed in the United States on May 27, 2026
★★★★★ 5
SO MUCH FUN!!
Format: Paperback, Format: Paperback
Just started it but.....This book has been so much fun. Not just for me but my husband and kids keep stealing it from me. So now I have to order more for them.... highly recommend if you are into mystery puzzles. Best one yet... can't wait to see more editions come out!!!
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Reviewed in the United States on May 1, 2026
★★★★★ 5
Frustratingly fun!
Format: Paperback
Delightfully frustrating looking through pages and pages of names but it’s quite fun if you have the patience. I bought it to keep me entertained while waiting for my broken leg to heal. I was determined to find it! Looking forward to doing another one.
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Reviewed in the United States on May 22, 2026