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Reduce distractions and focus on what matters to you with Sprout’s Harmonic 4.0 Bluetooth Headphones.
Active Noise Cancellation and Ambient Sound
Get closer to your sound without the beat of the street or the hum of the bush. Harmonic 4.0 combines powerful 40mm drivers with Hybrid Active Noise Cancellation technology for an immersive sound experience. This clever feature uses quad external and internal earcup microphones to neutralise ambient noise and block out distractions, bringing you closer to the music. When you need to stay aware of your surroundings, simply switch to Ambient Sound mode, which lets outside noise in without missing a beat.
Share your sound
Sprout’s Duolink™ technology lets you share sound between any two DuoLink™ compatible headphones, making them perfect for travel partners or entertaining kids.
Power on and on
Whether you're commuting or working through the day, the Harmonic 4.0 offers up to 50 hours1Refer to disclaimer of playback time to keep your music going. In a rush? A quick 10-minute charge can provide up to 5 hours1Refer to disclaimer of listening time.
Designed for convenience
Harmonic 4.0 swivels into its durable carry case and includes a USB-C charging cable, a plane adapter, as well as an AUX cable for wired listening when the battery runs out. It also features a flexible headband and over-ear soft memory foam earpads, making it great for all-day wear. Plus, with a built-in microphone, it’s ideal for taking calls on the go.
Legal disclaimers
- Playback time dependent on volume level and audio content.
- 1000mAh battery capacity for up to 50 hours playback without ANC (dependent on volume level and audio content)
- 40mm drivers for immersive sound
- Active Noise Cancellation and Ambient Sound modes
- Hybrid Noise Cancellation with quad mics and digital ANC processing
- DuoLinkâ„¢ to share audio with compatible headphones
- 2.5 hour USB-C fast recharge
- Built-in microphone for hands-free calling
- Flexible headband for comfort
- Memory foam over-ear cushions
- Qualcomm chipset
- Bluetooth V5.3
- 24-month warranty.
- Harmonic 4.0 Bluetooth Headphones
- USB-C to USB-C charging cable
- Aux-in audio cable
- Plane adaor
- Carry case
- Product manual.
- Must be 18+ with an active service.
- Points are earned on payment for services or pre-paid recharge (excluding outright purchases, refunds, credits & late payment fees).
- Points expire 3 years from earning.
- Marketing opt-in required (preferences can be changed).
- Excludes Telstra Enterprise and Corporate accounts.
- Read the Telstra Plus terms and conditions
Earning points
- Points are earned on payment for services or pre-paid recharges (excluding outright purchases, refunds, credits & late payment fees).
- Points earned on payments will be available in your account between two and four business days from when Telstra receives your payment.
Using points
- Points can only be used towards payment for one eligible item in your cart.
- Points will be deducted from your account when you place your order.
- If using points for a repayment option, the total points applied to the item will be deducted on a one-off, upfront basis and the reduced dollar amount will apply towards the monthly payments.
- If you cancel your order, any points applied will be refunded to your account within 2 business days.
- Read the Telstra Plus terms and conditions
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