Bluetooth 1) bluetooth version: v2.0 csr bc4 class 2 2) operation range: 10m 3) dimensions: l67.5mm x w19.5mm 4) point-to-point connection 5) weight: 12g 6) talk time: 9 hours 7) standby time: 300 hours 8) charging time: 2 hours 9) headset default pin: 0000 10) battery: rechargeable, lithium 150mah 11) charger: 5v dc 100-240v ac with adaptor 12) operation temperature: -10 - 55fpc 13) storage temperature: -20 - 60fpc 14) colors available: gray/white/black/pink/blue 15) switch on/off, led indicating light, rechargeable, Energy status indication Unit dimensions: l67.5mm x w19.5mm