Model : KD05 Color : Black & White Bluetooth Version : V5.0 Support Bluetooth Profile : A2DP, AVRCP, HSP, HFP Bluetooth Working Frequency : 2.402GHz-2.480GHz Bluetooth Range : ≤10 meter Speaker Power : Rating 3mW S/N : ≥90dB Frequency Response : 50Hz~20KHz Battery : Lithium Battery-3.7V, 60mAh Charging Time : About 2 hours