The EarFun K4 in violet is a playful Bluetooth kids headphone with three safe volume ceilings, five colourful lighting modes and up to 90 hours of rated playtime. Setup is straightforward, but the first ten minutes — pairing, volume limit and light mode — decide whether it feels fun or overwhelming. This guide walks you through it in five steps.
Disclosure: this guide contains affiliate links (Awin). If you buy through them we may earn a commission at no extra cost to you. Specs come from the official product page.
What you need
- EarFun K4 kids headphones (Violet)
- A Bluetooth phone, tablet or laptop
- The USB-C cable from the box
- A minute to size the headband on your child
Step 1: Pair with Bluetooth 5.4
Power on the K4, put it in pairing mode and select EarFun K4 on the device. Bluetooth 5.4 keeps the connection steady across phones, tablets and laptops for music, games and calls.
Step 2: Choose a volume limit
Cycle between 74, 85 and 94 dBA. Use the lower limits for homework and quiet rooms; keep 94 dBA for louder travel days. Setting the limit before playtime avoids the “just a bit louder” spiral.
Step 3: Set the LED lighting modes
One button cycles five colourful lighting modes. Leave them on for fun sessions, or switch the LEDs off when your child needs to focus on reading or homework.
Step 4: Size the headband
Extend both sides evenly until the soft cushions surround the ears completely. Start the first track with the device volume low, then raise it gradually inside the chosen limit.
Step 5: Charge with USB-C
EarFun rates a full charge at up to 90 hours of playtime, and a 10-minute quick charge at about eight extra hours. Top up before long trips so the lights and Bluetooth are not cut short mid-journey.
Pro tip
If siblings share the K4, agree whose light mode is “default” and whose volume limit is locked for school days. One sticky note on the charging cable saves arguments.
Everyday care: wipe the ear cushions, coil the USB-C cable loosely, and pack the headphones folded so the LEDs and hinges are not under a heavy lunchbox.
EarFun K4 Kids Headphones (Violet)
Wireless over-ear kids headphones with Bluetooth 5.4, 74/85/94 dBA volume limits, five LED lighting modes, 40 mm drivers, a built-in mic, BPA-free certified materials and up to 90 hours of playtime. Price on the EarFun UK store on 18 October 2026: £16.12 (list price £24.99). Prices change, so check before you buy.
FAQ
Does the EarFun K4 have lights?
Yes. It has five colourful lighting modes controlled with one button, plus the option to turn them off for quieter study time.
What volume limits does the K4 offer?
Three: 74, 85 and 94 dBA. Pick the lowest that still works for the environment.
How long does the battery last?
EarFun rates up to 90 hours on a full charge, with about eight hours from a 10-minute USB-C quick charge.
Is the K4 Bluetooth only?
This K4 is a Bluetooth 5.4 wireless model. Charge it with USB-C; it does not rely on a 3.5 mm headphone jack.
