Spec: Item Type: Earbuds Material: ABS Version: V5.1 Frequency : 2.402GHz-2.480GHz Transion Dnce: Approx. 20m / 65.6ft Built-In Lithium Battery: 50mAh for Left and Right Earphones, 2000mah for Charging Compartment How to Use: 1. Remove the headset from the charging compartment, the headset will automatically turn on, at this time the headset indicator light flashes alternately in red and blue, and it is in the pairing state.2. Turn on the of the device you need to pair, search for the name True Stereo V5.1 and connect. packing list: 2 Pairs x Ear Caps 1 x Charging Cable 1 x Charging Compartment 1 Pair x Earphones See more5.1 system, the signal is more stable, the transion dnce is longer, 65MS is about 0.065 seconds, no inductive delay, lower power consumption, professional game mode. DUAL-MODE DUAL-DECODING:Dual-mode dual-decoding, music and games can be switched at will, and dual-channel pickups can communicate clearly, allowing you to have a better on-site experience. The charging compartment mirror screen is designed to make up a small helper, one thing is multi-purpose, portable and thoughtful design, and it is also equipped with LED digital battery display. Dual-mode dual-decoding, music and games can be switched at will, and dual-channel pickups can communicate clearly, allowing you to have a better on-site experience. Charging Compartment&Mirror Screen Design: The charging compartment mirror screen is designed to make up a small helper, one thing is multi-purpose, portable and thoughtful design, and it is also equipped with LED digital battery display.