Bluetooth Version       Bluetooth 3.0 + EDR

Bluetooth Name          BTS-19

FM Frequency             87.8-108.0 (auto scanning)

Working Current          ≤ 30mA

Working Voltage           DC 3.7 V

Charging Current        DC 5V   500mA (red LED glints)

Speaker Unit              waterproof speaker φ54   4Ω   3W

Speaker Frequency         100-18000Hz

Microphone               5.0*6.0mm omnidirectional;

S.N.R:                 ≥-75dB

Battery                  500mAH   3.7V polymer lithium battery

Battery Life              ≥ 300 times (after 300 times charge and recharge cycle, the battery capacity still maintain ≥80%)

Charging Time           3H (fully charge)

Standby Time             ≥ 200H

Working Time             ≥ 8 H(in appropriate volume)

Working Distance         ≥ 10M (in the open air)

Waterproof rank               IPX 4 (no harmful effects from any direction by water splashing)