STRONG BASS AND HIGH PERFORMANCE - Receive a perfectly clear sound with Hi-Fi headphones from Edifier BLUETOOTH V4.0 - Experience low latency and high performance audio processing sound from Edifier with Bluetooth 4.0 STRONG SIGNAL AND BATTERY LIFE - Perfect for commuting; Bluetooth boasts a 10-hour battery life and 10-foot range LIGHTWEIGHT FOR LONG USE - Listen to your audio all day long with these Bluetooth headphones you'll barely notice them there 12-MONTH USA WARRANTY