Bluetooth earbuds for mobile games: latency explained
What latency is
Latency is the time between the phone playing a sound and you hearing it in the earbuds. Over Bluetooth, sound has to be compressed, sent and decoded, so there is a small delay.
Why it matters in games
With music and podcasts, the delay goes unnoticed. In fast games, footsteps, shots and effects need to arrive with the picture, or you react too late.
Game mode
Game mode cuts the delay in exchange for a connection that is more sensitive to distance and obstacles. On the TESNA GTA02, latency drops to about 60 ms in game mode. For films and music, the normal mode is enough.
Where the delay comes from
When a game makes a sound, the phone compresses it, sends it by radio, and the buds receive it, decompress it and play it. Each step takes a few milliseconds, and the buds also keep a small buffer of sound so it does not cut out if the signal dips for a moment.
For music and films the delay does not matter, because the phone compensates: the picture waits for the sound. In a game, though, the sound comes after you press, and the phone cannot know in advance what you will do. That is why a shooter or a rhythm game feels "late" on ordinary buds.
Which games feel the difference
Rhythm games, where you press exactly on the beat, are the most sensitive: even a small delay makes you miss notes. Next come shooters, where footsteps and gunfire tell you where the enemy is, and fighting games.
Strategy games, puzzles and adventure games do not need low latency: there full sound and battery matter more.
The GTA02's game mode cuts the delay to about 60 ms, low enough for action games to feel on time for most players.
Tips for lower latency
Keep the phone close to the buds with nothing between them: a chest pocket works better than a rucksack. Close apps using Bluetooth in the background and disconnect other Bluetooth devices from the phone while you play.
Turn on game mode before you start the game and off afterwards: it can use a little more battery and adds nothing for music.
If the game has an audio calibration setting, use it: it makes up for the delay that remains.
Battery in long sessions
The GTA02 lasts 9 hours on a charge plus 27 with the case, enough for several long gaming sessions. It weighs 4.6 g a bud, so it does not tire your ear after an hour. It is rated IPX4, so it handles sweat, useful in summer.
In games it is usually the phone, not the buds, that runs flat first: keep a charger or a power bank nearby.
TESNA GTA02
The GTA02 are music-first true wireless earbuds with warm bass. They last 9 hours per charge plus 27 from the case, weigh 4.6 g a bud and are IPX4. They connect over Bluetooth 5.3 to iPhone and Android.
Wired or wireless for gaming
Wired headphones have no Bluetooth delay, so for competitions they remain the pro players' choice. Many new phones, though, no longer have a headphone jack, and the cable catches when you hold the phone in both hands.
Wireless buds with a game mode are the right compromise for most people: freedom to move, no tangled cable, and a delay low enough for ordinary action games.
How the GTA02 sound
The GTA02 have a warm tuning: the bass is gently lifted, which suits pop, hip-hop and podcasts, and in games makes explosions and engines sound fuller. The drivers are 12 mm, large for a 4.6 g true wireless bud.
In games where the direction of footsteps matters, stereo sound tells you which side the enemy is on. Keep the volume moderate: at high volume fine detail gets lost, and your ears tire faster in long sessions.
Every model is in the shop, under true wireless earbuds.