We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Compact rectangular voice amplifier with clip and headset microphone, matte finish

BFKK

BFKK SD-258 portable speaker 10W 12h .36 lbs

SKU CH-35AQ-N5YV8

A 10 W voice amplifier that runs 12 hours and weighs .36 lbs, loud enough for 100 people across 11800 sq ft

  • 10W output reaches 100 people across 11800 sq ft
  • 12 hours voice amplification from 1800mAh battery
  • Weighs only .36 lbs with detachable belt clip
  • 5mm AUX input turns mic port into wired speaker
  • TF card and USB flash drive playback supported

BFKK SD-258 portable voice amplifier

The BFKK SD-258 is a compact, new portable voice amplifier designed to project clear sound across large spaces. It delivers 10W output power rated to cover approximately 11800 sq.ft for audiences up to 100 people. Weighing only .36 lbs, it includes a detachable clip and waistband for hands-free wear during extended use. A built-in 1800mAh rechargeable battery provides up to 12 hours of voice amplification on a full charge.

Suited for teachers guides and fitness instructors

This amplifier suits educators, tour guides, coaches and fitness instructors who need to preserve their voice while addressing groups indoors or outdoors. It supports MP3 playback via TF card or USB flash drive and functions as a wired speaker through a 3.5 mm AUX connection. Buyers requiring wireless streaming or multi-speaker pairing should consider other options as those features are not included.

10W output covering 11800 sq.ft

The single specification that determines suitability is the 10W output power rated to cover 11800 sq.ft. This level addresses rooms or outdoor areas holding roughly 100 listeners without distortion. If your venue regularly exceeds that capacity or demands higher sound pressure, a more powerful system will be necessary.

Highlights

  • 10W output reaches 100 people across 11800 sq ft
  • 12 hours voice amplification from 1800mAh battery
  • Weighs only .36 lbs with detachable belt clip
  • 5mm AUX input turns mic port into wired speaker
  • TF card and USB flash drive playback supported

Specifications

No published specifications for this item yet.

Questions about this item

Does the 10W SD-258 get hot or noisy after a full 12-hour day of use?

The 10W amplifier runs cool and silent with no whistling or distortion, and the 1800mAh battery is rated for 12 hours of voice amplification on a single charge.

What cable or accessory must I already have to play audio from my phone through the 3.5 mm input?

A standard 3.5 mm AUX cable connects your phone or computer to the microphone port, which doubles as an AUX input for wired playback.

Will the TF card slot on the SD-258 read the same Micro SD cards I use in older cameras?

Yes, the TF (Micro SD) card slot plays MP3 files directly, and the USB port accepts flash drives for additional music sources.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.