# Monodeal S870 Bone Conduction Headphones, Bluetooth 5.4, IP68, 8GB MP3

IP68: Monodeal S870 Bone Conduction Headphones combine an open-ear design with Bluetooth playback and a built-in MP3 mode. The listing describes them for swimming and sports, with an 8GB player for listening without a phone connection and a stated battery life of up to eight hours.

- [Original product page](https://bargainpostbox.co.uk/product/monodeal-s870-bone-conduction-headphones)
- [View offer](https://bargainpostbox.co.uk/visit/monodeal-s870-bone-conduction-headphones)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Monodeal
- Model: Bone Conduction Headphones S870
- Category: Electronics > Headphones
- Price: 42.47 GBP
- Previous price: 49.99 GBP
- Discount: 15%
- Price checked: 2026-11-14T09:55:15.057Z
- Rating: 4.4 / 5
- Reviews: 930

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- The open-ear bone-conduction design leaves the ear canals uncovered.
- Bluetooth 5.4 and an MP3 mode are described, so stored music can be used without a phone connection.
- The listing claims IP68 waterproofing and describes use for swimming and other water sports.
- Button controls are listed for playback and calls. The supplied battery claim is up to eight hours.

## Pros

- Built-in MP3 playback is useful in the water, where the listing says Bluetooth does not work underwater.
- Open-ear placement keeps the ear canals clear and can help users remain aware of surrounding sounds.
- The stated two-hour charge time is paired with a listed eight-hour battery life.

## Cons

- An open-ear design does not isolate the listener from surrounding noise, which may be a drawback in noisy settings.

## Specifications

### Identity
- Brand: Monodeal
- Model: Bone Conduction Headphones S870
- Colour: Light grey
- Ear placement: Open Ear
- Earpiece shape: bone conduction
- Form factor: True Wireless
### Connectivity and controls
- Wireless connection listed: Wireless
- Wireless technology: Bluetooth
- Bluetooth version: 5.4
- Bluetooth range: 10 Metres
- Control method: Push Button
### Power and battery
- Battery life listed: 8 Hours
- Charging time: 2 Hours
### Materials and protection
- Water resistance listed: Waterproof
### Other listed details
- Audio driver type: Bone Conduction Driver
- Compatible devices: Cellphones
- Included components listed: User Manual
- Manufacturer warranty listed: 1 Year Manufacturer

## Before you buy

- The title claims 32GB memory, but feature and product-description text specifies a built-in 8GB MP3 player. Verify the storage capacity for the selected listing. The feature text also claims up to 1,500 songs, without resolving that discrepancy.

## In the box

- User manual (Included)

## A good fit for

- Swimmers who want stored MP3 playback without relying on Bluetooth underwater.
- Runners, cyclists and sports users who prefer an open-ear design.
- Buyers seeking button controls and a claimed eight-hour battery life.

## Less suited to

- Listeners who need noise isolation or an in-ear fit.
- Buyers who require confirmed 32GB storage before purchase.

## Customer feedback

Customer feedback highlights comfort, ease of use, sound quality, Bluetooth connectivity, battery life and reports of underwater use, including snorkeling. Those points are relevant to the open-ear design, listed eight-hour battery life and swimming-oriented MP3 mode, but individual results may differ. The overall rating distribution is mostly five-star, with a smaller but noticeable one-star share, so the aggregate does not show whether the concerns relate to fit, sound or another aspect.
- Positive themes: Customers report comfort and ease of use, and praise sound quality and Bluetooth connectivity.
- Positive themes: Feedback describes good battery life and use underwater, including a snorkeling example.

## Frequently asked questions

### Can these headphones play music without a phone?
The listing describes an 8GB built-in MP3 player for offline listening. Bluetooth is listed for wireless connection, but the description says it does not work underwater.
### Are the headphones suitable for swimming?
The listing claims IP68 waterproofing and describes swimming use. This is a manufacturer claim rather than an independently verified performance result.
### How much storage do they have?
The title says 32GB, while feature and product-description text says 8GB. Check the selected listing before buying if capacity matters.
### How long does the battery last?
The listed battery life is 8 Hours, and the feature text describes up to eight hours of music or calls with a full charge taking about two hours.

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## Images

![Monodeal S870 Bone Conduction Headphones, Bluetooth 5.4, IP68, 8GB MP3 — 1](https://bargainpostbox.co.uk/i/aNx1JkbFKlMo7cVEEHWTkYXzLXA0nLXuheKLAOI93eXcHPqU4XiEtcWQ8gB9Lk4jxUkwz1dH4xHjP6ZvBqOjokqZYpqvO1t48ZBl8ceQNmbbDqBrFEaMITs6.jpg)

![Monodeal S870 Bone Conduction Headphones, Bluetooth 5.4, IP68, 8GB MP3 — 2](https://bargainpostbox.co.uk/i/evGnemKcc2PQ54Yy1OyairRhNieVCe6V0ujqy04zG4RzZdWy7Db0-uY7MDL59pfb9XqEyKPyuZgqYnx0ZNFp3KZjTyyAMsxRa1o9EK6yuhzE2wjuyXEDC0in.jpg)

![Monodeal S870 Bone Conduction Headphones, Bluetooth 5.4, IP68, 8GB MP3 — 3](https://bargainpostbox.co.uk/i/RGkjI_R84yismcjle7gKD3kT4DsMt4nR1tHU_2Tl5xpzr7PEB3hwOelHzO3qsuSVhxRjcrkVNnaCJKmh53Wbo_ammwaA1P9TS1VsfHAV6mLRro4g3dqDdV17.jpg)

![Monodeal S870 Bone Conduction Headphones, Bluetooth 5.4, IP68, 8GB MP3 — 4](https://bargainpostbox.co.uk/i/fF4CWd3lNIhBRIvwi4v2eDn4TqTo5zGwjMAx_x-IttzxFTquXty-xxONOyv8kJAKvgH5G2dhpaXSKZM7dSRtfiLG6BeQmp-pQWIt0qITWsaSMYcChgx6ehAm.jpg)

![Monodeal S870 Bone Conduction Headphones, Bluetooth 5.4, IP68, 8GB MP3 — 5](https://bargainpostbox.co.uk/i/dJHX6kJAbZ1uolnzXrNVhmltZ3izLH9XMgVovnZ0i-I9U-ph4GS9m23sxqZRzHcUBOXpUM7jfAYW5Bz1jyiEZTvmvkLGMQtoxfUleVPI-WReF7RBbt2VrQ5g.jpg)

![Monodeal S870 Bone Conduction Headphones, Bluetooth 5.4, IP68, 8GB MP3 — 6](https://bargainpostbox.co.uk/i/lVk5VyIrE1DW1KFSBTVHBFHZlqNMwqprJukuZnr2EYqmykGQQyMewg3hTZfHOQxab2SK5jsfBJ6aYDRHC1N7cQStX8uujhS67f10uLjhef0v3arsygUmZdUL.jpg)

![Monodeal S870 Bone Conduction Headphones, Bluetooth 5.4, IP68, 8GB MP3 — 7](https://bargainpostbox.co.uk/i/5SuRZSI4_WAZtf2WbAzpBacaEHaXja1pLlDJvekZ9e_fQvu9dFMsq29n5b1j5r6V1XwH4ZNt75jUtrd28Prqs3lDHVHCqNyTrmHBD35WpUUDw3sL6tfCbZie.jpg)