If you want to listen through wired 3.5mm headphones while charging, choose SIXSIM USB C; if you need a straightforward charging cable for a USB-C device, choose PROTEAR USB C Cable. For side sleepers choosing between these two accessories, the key difference is simple: SIXSIM adds audio and charging at once, while PROTEAR is a 3.3-foot USB-to-USB-C charging cable.
My pick is SIXSIM for anyone who still uses wired headphones and wants to keep a phone charging during a call, game, or video. PROTEAR makes more sense when you only need a cable to recharge compatible gear.
• SIXSIM USB C’s biggest strength: Combines a 3.5mm audio jack and a USB-C charging port, with PD charging support up to 60W. Trade-off: It does not support data transfer.
• PROTEAR USB C Cable’s biggest strength: A simple 3.3-foot USB-to-USB-C cable that can charge from a power adapter, computer USB port, power bank, or car charger. Trade-off: It does not add a 3.5mm headphone connection or provide a second port.
• Choose SIXSIM USB C if you use wired headphones with a compatible USB-C device and want to charge while listening.
• Choose PROTEAR USB C Cable if your priority is a basic charging cable, particularly for compatible PROTEAR rechargeable headphones.
• For side sleepers: SIXSIM is the more relevant pick when wired audio and simultaneous charging are the goal; PROTEAR is a charging accessory, not an audio adapter.
SIXSIM is a two-port adapter for people whose device has USB-C but whose headphones use a 3.5mm plug. It provides that headphone connection while leaving a USB-C port available for charging. That combination suits someone who watches videos, takes calls, or plays games with wired headphones and does not want to choose between listening and charging.
The adapter supports PD charging up to 60W. Its listed audio specifications include DAC support at 16-bit/192 kHz or 24-bit/96 kHz, and ADC support at 16-bit/48 kHz. It is compatible with CTIA and OMTP headphone wiring standards. Those details make it the more feature-rich option here, though they do not turn it into a cable for file transfers: data transfer is specifically unsupported.
The two-pack may be convenient if you want one adapter in more than one place, such as beside a bed and in a travel bag. I’d consider it for a side sleeper who prefers wired earbuds or headphones and needs charging at the same time. Skip it if your headphones are USB-C or wireless, or if your main need is a simple charging lead.
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We compare products from their published specs and features; the verdicts below are our independent editorial opinions.
Updated: 2026-10-23 · 6 min read · Independent comparison
PROTEAR USB C Cable: Who It's For
You can use it with a power adapter, a computer’s USB port, a power bank, or a car charger, as long as the source has a suitable USB port. That flexibility can be useful when you want a replacement charging cable for a compatible device or need a lead that works with the USB ports you already have.
The trade-off is equally direct. This is not an audio adapter, and the product information does not describe a separate headphone jack, simultaneous wired listening, or a charging wattage. I’d choose it if charging is the whole job—especially for compatible rechargeable headphones. If you need a 3.5mm audio connection while charging, SIXSIM is the one that addresses that use.
• Best for wired 3.5mm headphones while charging → SIXSIM USB C. It has a headphone jack and a USB-C charging port in one adapter.
• Best for a simple USB-A-to-USB-C charging connection → PROTEAR USB C Cable. It connects a USB port to a USB-C device.
• Best for side sleepers using wired headphones → SIXSIM USB C. It is the only one of these two products that provides a wired headphone connection.
• Best for charging compatible PROTEAR rechargeable headphones → PROTEAR USB C Cable. The cable is specifically described for PROTEAR rechargeable headphones.
• Best when you want a stated charging ceiling → SIXSIM USB C. Its PD charging support is listed up to 60W; actual charging depends on the connected device and power source.
• Best for a clearly specified cable length → PROTEAR USB C Cable. Its length is listed as 3.3 feet, or 100 centimeters.
• Best for two adapters in the package → SIXSIM USB C. The listed contents include two adapters; PROTEAR’s listed contents include one cable.
• Best for moving files through the accessory → Neither. SIXSIM explicitly does not support data transfer, and PROTEAR is described as a charging cable.
The choice is not really about which accessory does the other one’s job better. They serve different jobs. SIXSIM combines analog headphone audio with charging; PROTEAR supplies a USB-A-to-USB-C charging connection. Decide whether you need audio access or a basic cable, then check that your device and charging setup match the product’s connection.
For shoppers searching for the best IPX7 waterproof gaming headset for side sleepers, neither product is a headset, and neither data sheet gives an IPX7 rating. These accessories should not be treated as waterproof gaming gear. Similarly, neither is a pair of multipoint headphones for side sleepers: SIXSIM is an adapter, and PROTEAR is a cable. If your search is for the best open ear headphones for side sleepers, these products are not headphones either. They can only be relevant if you already own compatible audio equipment and need the connection or charging function described above.
I would buy SIXSIM USB C if I wanted to use 3.5mm headphones and charge at the same time. The separate audio and charging connections make it more useful for that specific routine, including for side sleepers who prefer wired headphones. I’d choose PROTEAR instead when I simply needed a 3.3-foot charging cable for a compatible USB-C device.
Yes. It provides a 3.5mm headphone jack and a USB-C charging port, so wired listening and charging can happen at the same time. PD charging is supported up to 60W; the adapter does not support data transfer.
No. It is a USB-to-USB-C charging cable, listed at 3.3 feet long. Its product information does not describe a 3.5mm headphone jack or an audio function.
Choose the PROTEAR cable if your need is charging compatible PROTEAR rechargeable headphones through USB-C. Choose SIXSIM only if you specifically need its 3.5mm audio connection and USB-C charging port for a compatible device.
Start with what you need it to do: SIXSIM provides two adapters and combines wired audio with charging, while PROTEAR provides one 3.3-foot charging cable. Check the current price on Amazon using the page’s button, then compare it with the function you actually need.
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