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
Two wireless karaoke microphones with built-in speakers, light-up mesh grilles, and control buttons

The Singing Machine Co., Inc.

The Singing Machine Co., Inc. SMM478 Duet Karaoke Microphones

SKU CH-3WYE-Y2A6H MPN SMM478

A pair of portable Bluetooth microphones with built-in speakers that link for duets, offer echo and volume controls, sync lights to your singing and run over four hours per charge

  • TypeMicrophone
  • Dimension3.2” W x 3.2” L x 10.00” H
  • Weight1.13 lb
  • Package ContainsModel SMM478 – Set of two Micro USB charging cable
  • Pair two microphones for instant duet performances
  • Lights pulse in time with your singing for visual flair
  • Adjustable echo and volume let you shape your vocal sound
  • Rechargeable battery delivers over 4 hours of continuous use
  • Line-in jack connects any external audio source for backing tracks

Duet karaoke pair

The Singing Machine SMM478 supplies two wireless microphones that each contain a built-in speaker so no external PA is required. They connect by Bluetooth and can also accept a wired source through the line-in jack. The set is aimed at casual singers who want a grab-and-go duet solution.

Bluetooth range and battery limits

Wireless pairing works only within standard Bluetooth distance, so the microphones must stay near the source device. Each unit runs on a Li-ion cell that delivers over four hours of continuous use before a recharge is needed. The line-in jack provides a fallback when Bluetooth is unavailable or the battery is flat.

Two microphones in one box

The package contains exactly two matched microphones and a single micro-USB charging cable. Buyers who need more than two voices or a dedicated charger for each unit will have to purchase additional hardware separately.

Highlights

  • Pair two microphones for instant duet performances
  • Lights pulse in time with your singing for visual flair
  • Adjustable echo and volume let you shape your vocal sound
  • Rechargeable battery delivers over 4 hours of continuous use
  • Line-in jack connects any external audio source for backing tracks

Specifications

BrandSinging Machine
SeriesKaraoke Microphones
ModelSMM478
Part NumberSMM478
TypeMicrophone
Dimension3.2” W x 3.2” L x 10.00” H
Weight1.13 lb
Package ContainsModel SMM478 – Set of two
Micro USB charging cable
Shipping weight0.74 kg
Package size380 × 78 × 41 mm

Questions about this item

What does the SMM478 duet pack include?

The package contains two SMM478 microphones and a Micro USB charging cable so both units can be powered up and used together right away.

How long does the rechargeable battery last during a karaoke session?

The built-in Li-ion battery provides over four hours of continuous singing with lights and echo effects active on a full charge.

How do I connect an external music source to the microphone speaker?

Use the line-in jack on the microphone to plug in a phone, tablet or other audio device and play backing tracks through the built-in speaker.

Also in this aisle

People compared these

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