TELEMOB "Retro Phone" Bluetooth Handset Easily Pairs with Almost Any Mobile Phone Through Bluetooth Technology. Reduces the Impact of Electromagnetic Radiation (Released from Your Cell Phone). USB Cable for Recharging Battery. Volume Control on Handset. Power Button, Power Saving: Handset Turns Off when Disconnected. Product Specifications: Version: V3.0. Bluetooth Profiles Supported: Handset. Frequency: 2.4GHz. Transmitting Power: Class II. Range: 32 ft (10m) Battery: Built-in Rechargeable Lithium Battery