Sena Bluetooth SR10 v1.2 User's Guide - Manual (Page 7)

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Technical Specifications:
• Bluetooth 2.1+EDR
• Supporting profiles: Headset Profile, Hands-Free Profile (HFP)
• Operating time: 12 hours
• Standby time: 10 days
• Battery charging time: 3.5 hours
• Lithium polymer battery
• Dimensions: 108 mm × 52 mm × 29 mm (4.3 in × 2.0 in × 1.1 in)
• Weight: 81g (2.86 oz)
• CE, FCC, TELEC, IC