Product details : Recrsi wireless Neckband Bluetooth Earphone RE-NY032 Earphone version-NY032 Profile Support-HSP HEP.A2DP.AVRCP Stan-by Time-400h Talk Time-9h Music play Time-8h Charging Time-2h Charging Voltage-DC 5V Frequency Range-2.402G-2480G Ambient Temperature-20/+60C Transmission Distance-10m Battery Capacity-110mAh. 3.7V Sensitivity-90dBt3dB Impedance-16π+15% Frequency Response-20-20000Hz Recrsi wireless Neckband : Earphone version-NY032 Profile Support-HSP HEP.A2DP.AVRCP Stan-by Time-400h Talk Time-9h Music play Time-8h Charging Time-2h Charging Voltage-DC 5V Frequency Range-2.402G-2480G Ambient Temperature-20/+60C Transmission Distance-10m Battery Capacity-110mAh. 3.7V Sensitivity-90dBt3dB Impedance-16π+15% Frequency Response-20-20000Hz Specifications of Recrsi wireless Neckband Bluetooth Earphone RE-NY032 Brand : No Brand What’s in the box : USB Charger