Features: 1) Dual purpose for work and pleasure 2) Natural sound impression by stereo to upgrade sound quality for FM radio effects 3) Independent FM and volume-adjust knobs (88 - 108MHz) 4) Comfortable to wear 5) Cell life in inverse proportion to length of use and amplification results in noisy environment 6) Service life of alkaline cell ranging about 70 - 72 hours 7) Easy cell replacement (1.5V x 2),simply by opening up the cell cabinet 8) NRR value=30dB 9) Battery lifespan: 12 hours (continuous) 10) Operation temperature: -10 – 45° C Other Price Terms: FOB Shenzhen Payment Terms: 30% deposit, 70% balance for shipment