Up to 10 hours play timeUp to 10 hours talk timeUp to 360 hours standby timeLess than 2.5 hours changing timeUnique neck-strap design for easy carrying Ultra light weight for all day comfortVibration Alert on callEasy magnetic earphone storageNoise reduction & Echo cancellation Changing voltage: MICRO USB 5VWorking current: 25-30 mAOutput power: 2x20mW  Blue tooth working range: 10MFrequency  range: 2.401-2.480GHzFrequency response:20HZ-20KHZ SNR : S/N≥95