Monster M3 Wearable Wireless Speaker vs Remax RB-M21 RGB Portable Bluetooth Speaker
A side-by-side comparison of two of the best speakers & sound systems you can buy in Sri Lanka right now — The Monster M3 Wearable Wireless Speaker is the cheaper of the two at LKR 4,499; the Remax RB-M21 RGB Portable Bluetooth Speaker costs LKR 500 more. Both are genuine with warranty, and you order in seconds with cash on delivery.
update Live LKR prices — updated August 2026.
At a glance
| M3 Wearable Wireless Speaker | RB-M21 RGB Portable Bluetooth Speaker | |
|---|---|---|
| Price | LKR 4,499 | LKR 4,999 |
| Discount | 65% off | 62% off |
| Warranty | 3 Months | 6 Months |
| Availability | In stock | In stock |
| Condition | Brand New | Brand New |
Which should you buy?
Choose the Monster M3 Wearable Wireless Speaker if…
- check_circle you want to spend less — it's LKR 500 cheaper
- check_circle the bigger saving appeals (65% off RRP)
Choose the Remax RB-M21 RGB Portable Bluetooth Speaker if…
- check_circle you'll pay LKR 500 more for its extra capability
- check_circle a longer warranty matters (6 Months)
- check_circle you want the fuller feature set on paper
Still can't decide? Our buying guides rank the full range, award by award.
Full specifications compared
| Spec | M3 Wearable Wireless Speaker | RB-M21 RGB Portable Bluetooth Speaker |
|---|---|---|
| Brand | Monster | Remax |
| Color | Black, Green | Black, Blue, Green |
| Input | Output – USB | — |
| Sound Mode | 3D Surround Sound Mode, Stereo Sound Mode, Smart Sound Mode, Live Sound Mode, Extra Bass Mode, Normal Mode,3EQ Modes | — |
| Control | Volume control, playback | — |
| Coding | sbc, AAC | — |
| Input power (W) | 25-49 watts | — |
| Voice Control | no | — |
| Waterproof | Yes | — |
| Built in microphone | Yes | — |
| Audio Crossover | Full range | — |
| Number of speaker enclosures | 1 | — |
| Power Source | USB | — |
| Channels | 2 (2.0) | — |
| Feature | Phone function | — |
| Communications | Bluetooth | — |
| Treasury material | Mineral | — |
| Category | Speakers / sound system | Speakers / sound system |
| Warranty | 3 Months | 6 Months |
| Bluetooth Version | — | 5.4 |
| Charging Time | — | 2.5 hours |
| Playtime | — | 4.5 hours at 100% volume with lights on; 10 hours at 50% volume with lights on |
| Impedance | — | 3Ω |
| Frequency Response | — | 70Hz – 20KHz |
| Speaker Power | — | 5W |
| Working Voltage | — | 5V |
| Lighting Modes | — | 4 RGB lighting modes |
| Design | — | Palm-sized cola can shape |
| Portability | — | Built-in silicone ring for easy carrying and secure placement |
Keep comparing
Frequently asked questions
Which is better, the Monster M3 Wearable Wireless Speaker or the Remax RB-M21 RGB Portable Bluetooth Speaker? expand_more
The Monster M3 Wearable Wireless Speaker is the cheaper of the two at LKR 4,499; the Remax RB-M21 RGB Portable Bluetooth Speaker costs LKR 500 more. Pick the Monster M3 Wearable Wireless Speaker if you want to spend less — it's LKR 500 cheaper. Pick the Remax RB-M21 RGB Portable Bluetooth Speaker if you'll pay LKR 500 more for its extra capability. Both are 100% genuine and supplied with warranty by DreamTek.
What's the price difference between the Monster M3 Wearable Wireless Speaker and Remax RB-M21 RGB Portable Bluetooth Speaker? expand_more
The Remax RB-M21 RGB Portable Bluetooth Speaker costs LKR 500 more — LKR 4,999 vs LKR 4,499 for the Monster M3 Wearable Wireless Speaker. Prices are in LKR and updated August 2026.
Can I pay for either in installments? expand_more
Yes. KOKO splits either into 3 payments — about LKR 1,680 each on the Monster M3 Wearable Wireless Speaker, or LKR 1,866 on the Remax RB-M21 RGB Portable Bluetooth Speaker. Those amounts include KOKO's 12% plan fee, so a KOKO order totals 12% above our cash price; cash on delivery and bank transfer cost the listed price.
Is cash on delivery available for the Monster M3 Wearable Wireless Speaker and Remax RB-M21 RGB Portable Bluetooth Speaker? expand_more
Yes — cash on delivery is available in most areas of Sri Lanka, so you can check either phone before you pay. We also accept bank transfer and KOKO installments.
Where can I buy the Monster M3 Wearable Wireless Speaker or Remax RB-M21 RGB Portable Bluetooth Speaker in Sri Lanka? expand_more
Order either from DreamTek in one step — name, phone and address — and we deliver island-wide from our Ja-Ela store — typically within 1–5 business days, with a Colombo pickup option too.