**Product Specifications:**

**Brand:** Step by Step

**Model:** HCD159

**Features:**

- Dedicated to providing high-quality telephone products for global consumers since 1995

- Precision craftsmanship and superior materials

- Rigorous testing including lightning protection circuit

- Made of ABS engineering plastic

- Keys tested for 400,000 presses

- Voice compression technology

- Thick gold-plated interface

- Spring tested for 200,000 insertions

- Thickened circuit board

- Conductive gel tested for 1,000,000 clicks

- Self-owned factory with over 300 service centers nationwide

**Functions:**

- No battery required

- Extension interface

- Clear call quality

- Storage for 10 frequently used numbers

- 8 selectable ringtones

- LCD screen with 5-level brightness adjustment

- Caller ID for 45 incoming calls and 10 outgoing calls

- Call transfer function

- Hands-free speakerphone

- 8 selectable ringtones

**Design:**

- Sparkling matte finish

- Black and white color options

- Classic and elegant design

**Specifications:**

- Material: Matte finish

- Call rejection function: Supported

- External line interface: 2 ports

- Call transfer function: Supported

- Caller ID storage: 45 numbers

- Redial function: Supported

- Outgoing call storage: 10 numbers

- Hands-free function: Supported

- Ringtones: 8 options

- Call display: Supported

- Volume adjustment: 3 levels + gradual increase

- Screen brightness adjustment: 5 levels

- Alarm function: Supported

- Caller ID format: FSK/DTMF

- Speed dial: 10 numbers

**Durability:**

- ABS engineering material

- Thick gold-plated interface

- Thickened circuit board

- Lightning protection circuit

- Rigorous testing for durability and performance in extreme conditions

**Certifications:**

- Product qualified certificate

- Network access permit

**Additional Features:**

- Easy-to-use interface

- Convenient call management

- High-quality sound

**Warranty:** 1 year

**Dimensions:** 23.4 x 5.6 x 3.9 inches

**Weight:** 2.5 lbs

Please note that the above specifications are based on the information provided.