The Green Lion Transparent Pro 2 Wireless Earbuds is a stylish yet practical earphone. This earbud can play nonstop music for up to 7 hours and can be on standby mode for 45 hours. It can stay connected within the distance of 10 meters and because it uses Bluetooth v5.3, you can expect a stable connection within that range. Additionally, due to the 4 ENC-equipped mics, the calls that you make would be as clear as they can be. In conclusion, the Green Lion Transparent Pro 2 Wireless Earbuds are one of the best earbuds for those who want convenience while being stylish. Specification Battery Capacity: 400mah Working Time: 7 Hours Bluetooth Version: V5.3 Transmission Range: 10M Standby Time: 45 Hours Features IPX4 Water Resistance Multi-Function Touch 30 Hours Music Playtime Comfortable To Wear 4 ENC Equipped Mic Hands-Free Calls 20Hz-20kHz Frequency